Out of all the things you listed (and I'd have a couple more), copy-paste is really what drives me insane, because it's completely cursed!

Sometimes, text copied from teams includes `[Sender Name, 2026-01-03, 21:51]` as a prefix—other times not. Sometimes you paste formatted text and it ends up pasted as formatted but inconsistent HTML, including (of course) text color of all things, rendering it black even with the dark theme, and thus unreadable. Other times you copy code, and there's two blank lines between each line when you paste elsewhere. It makes you cry, really.