A thing I've been guilty of
People who try too hard to prove that they're right about everything are often just stubborn and butt hurt about being confronted about their wrong behaviors in the past. As a result, their ego has taken a shot, so every confrontation is a not just a battle to prove they're right in that particular situation, but also a battle for their own ego.
I don't think I'm like this anymore, though many on this forum might think otherwise. But IRL, I find this to be even more annoying.
When they said "sit down", I stood up.