People should also accept when they win from misinputs instead of purely bitching when they lose from one. I've won and lost countless matches from things I didn't mean to do, it always goes both ways. Be honest with yourself, with your input errors, it will help your progress.
Grinding execution and mastering complex inputs and combos are some of the most fun and rewarding parts of playing fighting games. If everything had been easy to do along the way, I'd never have stayed in the FGC, but that's just me personally. I can't speak for anyone else.