I was having a lot of trouble with typos for a while, but the auto-commit userscript actually fixed it for me completely. All auto-commit does is automatically submit your answer once you’ve typed the correct thing. It doesn’t let really let you “cheat” imo so there’s no worry about ever abusing it.
But if I’ve typed my answer and it doesn’t auto-submit then it gives me a chance to notice my typo, fix it, and then it auto-sends. The point of the script is to make it so you don’t need to hit enter after you type, but mostly I need it so I can notice my typos before the answer sends.