One of mine (I have many yay neurodivergece) is when people say the phrase "a broken clock is right twice a day". The phrase is actually "a stopped clock is right twice a day." A clock that is stopped will definitely be right twice a day but a clock that is broken could be right multiple times a day or not at all depending on how it's broken. Maybe it's just a little slow running in which case it'll never be right. Maybe it's spinning wildly out of control so it'll be right a lot but still useless.
It annoys the shit outta me and it is so dumb it definitely should not. Anyway your turn.
People in media who black out/see red in order to fight. It's the butt of every joke in combat sports, but one time my friend put it in his novel and I protested during critique. As a rule of thumb, if you're doing something wrong, doing it wrong harder probably won't help.