Maybe you are overthinking. Are you losing on time or time pressure, or because you miss certain moves? If you are losing on time, maybe try playing longer time control games like 15/10 or 30/0. Try to think about each individual move and ask yourself, "Is this a blunder? Am I hanging anything? Can I take any pieces or pawns for free?" After each move by your opponent, ask yourself, "What is he/she threatening?"
Hope this helped.
Hello.
I am a 900~ elo chess player. After couple of months of playing and no study, I climbed to 1100+ elo. After that point I wanted to improve even further and bought a chess board and chess books. For a month I studied tactics, puzzles and basically philosophy of the game (no playing at all). After a month I returned to game and immediately dropped to 900~ elo rating. After I researched about this, people told me that this is temporary and my brain is rewiring and after it is done I will come back even stronger. However it didn't happen. Even after a hundred games. I regressed permanently. Once I was pushing 1200 elo, now getting beaten by 900's. It is extremely hard for me to beat >1000 elo players. Even 800's giving me hard time.
What went wrong? Did I embed my errors by studying alone? Will I ever improve?
Thank you.