Your on a winning streak now. Well done. The game against jssnich, you defended e5 with d6. Nc6 is a much more active way to defend the e5 pawn in the opening, when your opponent plays Nf3. It develops a piece. In the opening, look for moves that get your pieces out quickly. So in those sorts of positions prefer Nc6 to d6. You then have the option of playing d6 or going straight for d5 a little later, without losing time.
How can I get to 1000?

Yeah, I try the danish gambit, but recently sticking to my opening knowledge and using it, I seem much better off

Yeah Nc6 was an amazing move! Tops my other move, thank you all for so much support on a 4 streak if I win this +11 game
Learning a few basic endgames would be good, like knowing about opposition, key squares, and pretty much just how to correctly promote a pawn(or stop a pawn from being promoted)

Hi! My name is Lauren Goodkind and I’m a chess coach based and chess book author based in California.
I have tips to help you improve your chess skills so you can win more games.
I recommend playing with a slow time control, such as game in 30 minutes. You need time to think. Beginners tend to make a lot of silly moves with very little time. This makes sense since there’s a lot of pieces on the board.
I also offer a free beginner’s free eBook on my website, www.ChessByLauren.com in case you are interested. The book is about asking questions before each move.
Before each move, I highly encourage you ask questions before every move such as, “If I move here, is it safe?”, “Can I safely capture a piece?”, and more.
Also consider all checks and captures on your side and also your opponent’s side. If you are past this stage, then find a forcing winning line.
Learn basic tactics such as the fork, discovered attack, pin, and more. I offer interactive puzzles on my website: https://www.chessbylauren.com/two-choice-puzzles.php
If you are serious about chess, I highly recommend you hiring a chess coach to help you.
I hope that this helps.

Tbh what propelled me to 1000 when I was 800 was learning Vienna game theory but people will say thats not a good idea (whatever). Just learn some moves in a position you play a lot and learn why the best moves are actually the best moves if you know what im saying

Went from around 600 to 1300 in about a month. Only thing I did was to learn the London (Took the base ideas from Gotham Chess' video about it) and the Kings Indian/Pirc Defense and honestly, that was it.
When I lose, I try to find the spot where I lost and analyse my games.
Yesterday I played five games in a row which I lost. I should have just stopped after losing the first two. Don't play rated when tilted, honestly. It's not fun, you will lose more, make more mistakes, and there is no point in it unless you want to be a proffessional chess master.

According to the statistics, you gained 240 points in the last 30 days. At his rate, 1000 is 3 weeks away. I don't really see the basis of your complaining.
240 points is a lot. It's the difference between an average grandmaster and the world number 1.

Looks like you play long-time controls and you play as white with three knights opening. I would recommend you look at the Belgrade Gambit from Simon Williams. I would also suggest reading a book about the Scotch Game and create a study based on the book using Lichess.org.
The big problem with your game is with black as you lose more times than winning and drawing. I would personally recommend learning the French Defense either with the Chess.com course and/or with the book "Playing the French" by John Watson. There are other books too but that's the one I'm reading. The French help you dictate the game your way and avoids tricky lines in the Italian or Spanish games. Here is my chess study on the French Defense if you don't want to get the book. It has the Advanced, Exchange, and King Indian Attack all completed which even though I didn't finish the study, are the most relevant to your skill level as no one plays the Tarrasch or Classical Variation.
If you are mildly interested in the Queen's Gambit, you can check my two-part study here and here which covers almost everything you need to know about the Queen's Gambit as it is my only completed study. Hope this helps you in the opening
The tips listed by @DaBabysSideTing are a good starting point. If that fails you might try the suggestion by @pawnstar1957
My suggestion would be to take some time and browse your games on openingtree.com
For example, when playing white you've had this position 52 times.
Image
You have played many different lines.

Most of the time you play d4. A move that wins 31% of you games and loses 69% of your games.
Explore your play
And then you start exploring. 7 out of 16 times they took the pawn with exd4. You've won 1 out of those 7 games.
You can use the opening book to get a feeling for 'popular moves', in this case for 1600 and higher players.
Connect the dots
You can also see that your winrate is much higher when you play the most popular move Nf3