How can I improve? I am stuck

I am around 1800 and want to improve to 2000 by the end of the year. I am stuck at my current rating and don't know how to improve upon my game from here. Does anyone have any instructive feedback for me based on some of my games? Here are a few examples:

Here is a terrible loss that I had, I hope this is a game that could spark some constructive criticism and pointers:

I'm not sure if my advice qualifies since I'm literally in the early 1600's USCF OTB in regular and rapid. However, I find that working on my middlegame preparation and different endgame positions help drastically. I know chess.com has a lot of endgame work that players can practice and train with. The lessons on here are quite good as well (depending on what type of membership you have). Personally, I find that the more I practice what I already know, it paves the way for further and future preparation and improvement. However, I cannot stress enough the importance of practicing endgame work. Even 30 minutes to an hour a day of endgame work can help in the future in my opinion.

I hope this helps in a way. Take care.

I may not be quite as high-rated as you, and I can relate to this feeling sometimes. One of the biggest problems I can see is the awareness of attacks/tactics. Your tactics are pretty good, especially taking the rook for free in the first game (Chefs Kiss btw), but sometimes you struggle to find tactics your opponents are making use of like with the attack in the second game that caused your loss and the way you lost the queen, as well as the checkmate from the first game. Otherwise, you seem solid as a player, and just remember that the big difference between players from 1000-2000 is the tactics and the ability NOT TO BLUNDER (even though I'm at 1700 and struggle with that way too much).

Good luck bro!

I know how to get worse. I've dropped like 150 pts rapid in the last week. Make sure you play tired, unfocused, and get tilted after every bad loss. Let your rating become how good you are at chess and let it chip away at your self-esteem.

stop caring about rating and play openings you don't know your rating will suffer short term but it will exponentially increase your rating by allowing you to develop both your positional and tactical thinking.

ah yes, finally, a solution.

my rating is lower, so I'm not entirely sure that my advice qualifies, but at 1750, you should start playing more positional. In the first game, I saw you trade your active knight for his just-developed knight. Consider your trades. Is it good? Is it bad? otherwise, I would say that you are pretty solid in your rating. Good Luck my G.

You're 1100 otb. These are obviously online fast games! No books for that. Sorry

I don't quite understand what you mean by that. Could you elaborate?

he's telling you to play time controls like 15+10 or 25 min he was being kinda rude about it though. imo calculations really important so longer time controls do help or do puzzles and only make the move once your sure you have the answer.

pawn structures (general)

Learn the ideas of your openings! e4 in the Catalan is most of the time bad. Also when trading pieces always consider how your opponent might capture and how it might benefit them.

?

When you move your knight to a6 in the first game do you have a plan for him or are you just developing? He is literally blocked off in every direction so why move him there? I see the pawn tries to break him out but why on earth would your opponent take the pawn? It just helps you develop. From my ignorant perspective it seems like you are hoping your opponent makes a poor choice to develop your knight. It also seems like you do the same thing with attacking. I realize your queen would be blocked but why not just move the knight to d7 then queen e7? Thus completing development? Then in move sixteen why did you move the pawn? Why not develop the queen, attack, or prepare an attack? Why is your queen just jumping all over without really doing anything? Also, on move 28 why didn't you take the queen? Very low rated so I wondered if y'all could explain.

Knight a6 was by my opponent.