For me, it’s “Clear Storage”. Sometimes I try to clear the cache of some mobile game I’m playing and end up deleting all my progress instead.
The button on my mouse that changes the sensitivity. It’s right on top between the left and right buttons, so it happens quite frequently. Maybe I should finally figure out if I can disable it in settings somewhere, but then I’ll need to change sensitivity for some reason.
Also, when I swipe back on Android and it takes me to the home screen, closing the app. When I swipe back on purpose I don’t even want to go back to the home screen, usually just the top of the app, or clear route etc. from Google Maps, but it’s even worse when I accidentally swipe. Whoever made that design choice deserves a kick in the groin. That is like the most single annoying thing about Android I can think of.
