the algorithm on this site is awful

No, there's nowhere I'm aware of where it explicitly says that RD is not used for pairing selection. I asked a staff member that would know, after my last post, and was told that isn't part of the process though.

I mean i don't really want to investigate I'm just an agnostik person by nature i don't assume much.  Plus I don't think they want that information public so it would probably be fruitless anyway. I'm not saying it in any way supports the OPs claims just nit picking for clarities that i don't think its clear there is not things going on in the background.  If staff said it wasn't part of it its that is good enough for me do you have a link to that thread? 

When you're on a win streak, your rating improves... therefore the ratings of the opponents that you're paired with tend to increase. 

When you are on a streak, it is likely your underlying skill did not change much (i.e. you are getting lucky--that goes for both losing and winning streaks). As the streak continues, the probability you continue to get lucky diminishes, as your underlying skill drifts further from your opponents underlying skill, even if the stated ratings are similar

Ok so something I have noticed many times is that if you are tilting after losing say 10 games it will start matching you with people who are at least 100 points below your Elo and sometimes 200 or 300 points lower. It only does this if you lose a bunch of games in a row. This would seem to suggest that there is more than just your exact Elo score that goes into matching people up.

What is going on in that case? And no I'm not imagining this. If you'd like I can find multiple examples.

Why are some people being rude and saying things like "you are bad"? It seems to be something that happens on constant basis and i am asking a simple question Some people were nice Some were absolute jerks It's something wierd that you are always stuck and it's up towards a certain point and then a full week of wierd loses

One time, during one of my new accounts, I'd won something like 19 of the last 20 and it paired me with someone 200 points lower who had lost something like 8 games straight. I made a topic about it mocking the pairing... this was a few years ago.

People believe ridiculous things because they're ridiculous people. The OP, for instance, probably doesn't realize humans have naturally good and bad days... not just with chess, but anything. I suppose I can forgive him a bit because it takes something like chess before you realize it. Even on days where you feel completely normal, you can play like crap (whether it's chess, sports, music, etc).

There is no such thing in chess.com. 

One way to help avoid this is to play some unrated warm up games / play on a different account / do some puzzles. If you're performing poorly, then don't play rated on your main account.

People also set rules for themselves like they'll quit for the day after their 3rd loss.

These things help keep your rating from going up and down so much.

I think you're suffering from recency bias. I already said you've lost roughly half of your last 50 which is to be expected but you lost five in a row before making your post.

One thing I've done is pay attention to the number of candidate moves I consider, and how deep my calculations are. Nothing too specific, I'm not taking notes as I play, but I just try to be mindful of it.

When I'm playing very poorly I'm usually only considering 1 move, and I'm not calculating it very deeply... this sounds super obvious, but it's something you can miss if you're not paying attention.

Unfortunately this usually doesn't help turn a bad session into a good one, because the reason for not calculating normally is because I'm either emotional or too tired... so even when I'm aware of it it doesn't help me start winning... but it does make the poor performance less mysterious.

Tiredness is definitely an issue and/or lack of focus. I played two poor games followed by a good one tonight which I intend to finish the day on. I'm not playing Blitz anymore, I'm not learning anything from it. 15/10 seems about ideal, one or two quality games, then do puzzles the rest of the time.

Yeah, the 200 point difference ones are so rare it's hard to say. I looked at my last 3 that were that big and it seemed to be random.

I think the fascinating thing about chess.com is that you can be tilting but at the time it feels like you are playing just the same. But in hindsight when that happens with me it's obvious that there were differences in my thought process during the game. Like it took me a while to realize that when I'm playing well it's usually because I'm in a good mood and not tired so I'll make plans and weigh different scenarios because its fun to think and find out how different things might turn out. Which is sort of calculating I guess. But when I'm tired or in a bad mood I wont feel relaxed and will be more likely to react emotionally to how aggressively people play on the site and I wont do anything that feels even remotely like calculating. It took a long time to realize that there were these differences going on because subjectively it seemed like whenever I played  I was following the patterns that usually come up and using my usual openings. 

or hanging pieces at the lower levels

Yeah, this is a good way of putting it. Sometimes I'm just calculating a few different things that look interesting because yeah, it's fun.

But if I'm tired, it's just like "oh, my pawn is threatened, ok I'll immediately defend it... oh crap his knight was hanging and I didn't take it, what the hell is wrong with me."

Which is another thing... when I have energy and I'm in a good mood, if I make a blunder, I'm pretty quick to forgive myself. I think "ok, on to the next game, no big deal."

When I'm tired I'm immediately tilted and play even worse the next game.

It was in a personal message.

As you lose more, your rating drops. As your rating drops there are likely more members in your new rating band, even, lower, that you can be matched with. However, you likely are seeing patterns where it's actually random chance and there are losing streaks where it's the opposite.

cheaters = normal human psychology, apparently