Why did your emotions evolve all the way through from annoyance, to frustration, to contempt, with nothing being said, to the point where you are cussing someon

Why did your emotions evolve all the way through from annoyance, to frustration, to contempt, with nothing being said, to the point where you are cussing someone out? I'm genuinely curious if anybody that reads this thinks it's acceptable or normal behavior to levy a genuine swear-insult at a coworker. That sounds like a fucking awful work environment. Actually contempt for each other? What kind of awful office culture is that? I've had co-workers piss me off, I'm not pretending to be a saint, but there is always at a bare minimum mutual respect, or even below that an understanding that we have to share the same office at the end of the day, so insulting each other is pissing in the well.