yeah we all make mistakes all the time, poker is hard. Watched this review from GuerillaPoker recently where he reviewed some high stakes hand histories, and he talks about even the high stakes sickos on pokerstars make mistakes all the time.
https://www.youtube.com/watch?v=3wmMJJjm9ZQ&t=310s
In The Mental Game of Poker, he talks about how mistakes are inevitable, and our play is mostly going to be a bell curve, where we sometimes play our F game, and sometimes play our A game, but mostly play our B-C game. Our goal shouldn't be to play our A game all the time and get upset when we're not a total machine, but to shift the bell curve to the right, so that our C/D/F games are better (and by extension, our A game is better too).