How to Improve In Chess As a 450 Elo



Stop playing speed chess and slow down.
Perform a blunder check.
Ask yourself: "What is my opponent trying to do?"

The Question is also what did you try until now.
In my opinion, repetition of either a set of moves of your choice or by using an opening (of your choice), you could improve. Of course not only that. But it also depends on the way you like to learn.

Use your time and think.
This is a daily game, where you played every move in less than 1 minute, blundering 2 pieces and mate-in-1:
https://www.chess.com/game/daily/839001176
This is a 15/10 rapid game that you started with 15 minutes and finished with more than 17 minutes (???), blundering away all your pieces:
https://www.chess.com/game/live/147001405555?username=focus_068
Don't do that. Don't play random moves. Use your time and try to find good moves.

Learn exactly how to think in the opening, middlegame and endgame — this is what I teach.
Always blunder-check your moves.
Solve tactics in the right way.
Analyze your games.
Study games of strong players.
Learn how to be more psychologically resilient.
Work on your time management skills.
Get a coach if you can.