I Feel Like Such A Garbage Player

eh, stop resigning winning position would be on place to start. 

We all had games like that when we started playing chess. Maybe you have been playing chess with your friends and family for years but you have never faced this extended scholar's mate opening. It is good for you that you have seen it, even if you have fallen into the trap. Who cares, it is just one loss, but now you know this idea and this trap so you will not be falling for this crap anymore. It is better to fall for this crap online anonymously than in person, so be happy that this game has happened. Seriously, it is all part of getting better, having to deal with various dubious openings while you have lower rating, analysing those openings, getting experience in playing against them will be valuable later since if later one day somebody tries to surprise you with those dubious openings you will know how to react and you will be experienced in those openings. This is all normal and healthy for your chess development as long as you don't try to copy your opponents who try to play for tricks and who play dubious openings then you are on the road to 1000+ rating. To be honest, why just 1000 rating, if you love chess, you will probably keep playing and reach 1500+ rating. Be happy that you have the opportunity to improve in the next couple of months more than you have improved in the last decade. I highly suggest Ben Finegold lectures. You need to watch GMs or IMs on youtube in order to get your fundamentals down.  I have also watched Hikaru Nakamura speedrun videos while I was getting better (try watching speedruns where he plays legit openings instead of the Boncloud and instead of speedruns where he sacs his queen, try watching his older speedruns). This is what I did to get better. 

You started ok, but you have to play Nf6 instead of Nd4. After that, Bg7 probably and O-O, unless he just blunders material and it is safe to take it. But after O-O, you are safe and have a good position. Look at it this way, you should now know how to deal with this checkmate, so this loss will make you better in the long run.

And just to add to it. Of course, you can't play automatically in the opening. The opponent might play something bad, but tricky. For instance when you play Nf6 here, he might go crazy and play g4 with the intention to play g5 and to try to drive your knight out and checkmate. But that not only is slow and allows Nd4, it weakens his kingside as well, so if you follow it up in a right way, you will have a great position.

In any case, you are playing long games, try to use your time to think on your every move, in order to lose less often in this fashion.

Good luck.

i used to fall for the extended scholars mate and this one

I was playing a few daily games with some significantly higher ranked players. They were saying I play really well for someone of my elo and they don't understand how I'm losing to 600 rank players. I'm not saying this out of egotism, I'm bringing up because I'm wondering if it may cue anyone here into why I have been faltering. I noticed after they pointed that out with confidence I won a game against somebody of similar skill pretty easily.

Is it possible that my lack of advancement may be more psychological than skill-based? Like a lack of confidence after a loss or two and maybe I blunder more? I'm honestly just speculating.

Possible, yes.

The main immediate cause of the losses seems to be a failure of situational awareness... at some point in the game, after playing quite well for the first dozen or so moves, you suddenly stop considering the whole board and instead focus only on one small zone of the chess position.

This usually leads to an almost immediate blunder, as one of the hostile pieces outside the zone of attention suddenly swoops in and takes your Queen.

Apologies for being blunt, but...

Playing any serious game or sport for however many years against friends and family is completely different than playing those same activities in an actual club populated by serious players (online or otherwise).  Until you actually join such a group (which you have now done), you are a beginner.  Reading your original post, it sounds like you assumed, and maybe are still assuming, that you aren't a beginner, but that you are an experienced player who is inexplicably losing games.  Looking at your games, they look like typical beginner games to me.

Now that you have thrown your hat into a competitive arena, I think it would be the most fruitful to adjust your mindset and admit to yourself that you are a beginner.  There is nothing wrong with that - we all were there.  If you want to get stronger - and it seems like you very much wish to - I suggest that you commence studying as beginners are advised to study by experienced competitive players here on the forum.  I think you'll find dimensions of the game that you previously didn't know existed, and that you will also improve rapidly.

You played that game well while your opponent demonstrated exactly how not to play chess.That was a nice game, congratulations!

I have watched 6-7 of your losses and almost every single one of them you lost due to poor board vision. You hang pieces because you don't see that your opponent can take them. That's normal considering your rating and that you have never played online (my guess is that your OTB board vision is better than your online vision which immediately makes you a much better player OTB than online, since poor board vision is the root cause of your decisive mistakes). Keep playing online games and your online board vision will get better. I suggest you to read my comment about watching GMs and IMs and getting your fundamentals down, I see in your games that you have no impulse to play with all of your pieces, when you reach middlegame you stop developing your pieces, you are developing your pieces in such a way that you are blocking the development of your other pieces, you make empty 1 move threats which your opponent can easily meet without compromising his position, you don't have the impulse to have most of your pieces defended or have them be doing something useful. You don't look for checks and captures for yourself and for your opponent even though you play 1 hour time format games, you move way too fast, you should learn some basic tactical patterns etc.

I played chess a little bit when I was a kid, but I didn't play seriously. 3 years ago Youtube started recommending me agadmator videos, then, later, videos by other chess Youtubers were recommended to me, I watched top level players play against each other, I also watched  GMs beat beginners, I watched sub battles that were commented by titled players etc. I had an impression that immediately when I start to play chess I would be rated something like 1500 on this website or 1800 on lichess. I thought that players below such rating were bad and that I was definitely better than them. When I actually made my first online chess account (it was on lichess) I was rated around 1000, and that's the absolute beginner rating for that website, since ratings on that website are inflated compared to ratings here.

You're not garbage. I'm with you. I used to be 500 for so long, them suddenly I sprang to 700, then back down to 500 after a while. I luckily managed to get back to 630-640 though.

Happy chessing!

You are not alone. I feel like a garbage player to. But you know what. It is okey. It is in the end just a game. 

I played some hour long games and 45 minutes long games on other websites and I almost always finish those games with less than 20 minutes on the clock.

Eh, why the bishop doesn't kill rook? If it do that, black might be win material.

Who didn't follow for such things when they started to play chess, that's all part of the learning process. One general lesson which you can take from that loss is that you need to see all the captures and checks, you need to see what your opponent is threatening every single move. That will help you in a lot of other situations.

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It is a great thing that you face all kind of early queen attacks and dubious play. Here is what can happen if you only play in chess clubs OTB against people who don't play dubiously. This is not the first example of someone who has reached intermediate rating OTB (1600 USCF) and then started to play online and couldn't beat players below 1300 because players below 1300 would bring their queen early and play dubiously. The person who made the forum in the link struggled with players below 1300 on this website because he didn't have experience playing against dubious queen attacks and non orthodox, dubious play in general. https://www.chess.com/forum/view/general/why-are-lower-rated-players-so-much-better

By playing on the internet and playing against a lot of these players with dubious styles you will have experience at playing against them, so you will not get into a situation where you are 1600 OTB and yet you loose to 1200s on the internet. I really think it is a great thing that you face these early queen attacks, pawn pushers and all other sorts of dubious players.

i am still trash 

We're all trash players. It's just that some of us are worse than others.