I stopped tracking win rate and started tracking mistakes

I used to obsess over my W/L after every session. A bad record would make me tilt, but it never told me what I was actually doing wrong. Now I just note a few specific mistakes, like greedy removal or bad sequencing. I realized most of my losses weren't matchup issues. I was simply making worse decisions after playing for too long.

Does anyone else review mistakes instead of focusing on win rate?