I'm one step away from quitting if I did not return to 300 elo in blitz


It’s only you who can do such life-changing decision - to quit or not to quit chess for whole 1 week.
You should get fun from playing. If it’s not the case, do a break and return. Or start another sport - there are plenty of them.

Just cheat. Everyone does. Remember every game you lose, you lost to a Stockfish engine browser plug in