How do I stop blundering?



Hanging queen (and other pieces) with no complicated tactics. Sometimes blundering due to nice forks

Try playing Giveaway chess. Seriously, it helped me see obvious blunders before I make them. Even my CM coach said this.

It requires doing something that is boring. Picture the board after you move, then consider every possible response by your opponent.
In Daily Games, because you have to confirm each move, you don't have to just imagine the board after you've moved.
If you install an extension called "Move Confirm", you can do this for Live Games as well.
available for Chrome or Edge, chesscom-move-confirmation