movie suggestions about snapping at everyone ?

hi, im looking for a movie about a character who absolutely snaps at everyone. a character who deals with so much stuff until at some point they can’t take it anymore and breaks down and does something unexpected or bad: they kill someone, they kill themselves, anything. drama, horror, gory; any genre or type of movie is fine. i’m not looking for a specific movie, i’m looking for one that has that plot, idk if yall know any.