First real code review at the new job flagged twelve things on a PR I thought was clean, wanted to quit that afternoon
Submitted what felt like a solid PR, got back a review with comments on naming, a missed edge case, an unnecessary abstraction, and a suggestion to split it into two smaller PRs. None of it was mean, all fair actually, but reading twelve separate comments on my first real contribution made me want to close the laptop and reconsider the whole career change. Fixed everything, resubmitted, got approved with one more small note. Second PR two weeks later got three comments total. Apparently that's just the curve.