What is the most arrogant thing you've heard someone say?

I was sort of friends with a dude I met on SW who was CONSTANTLY talking about how much better he is than literally everyone. I looked past it because when people talk themselves up like that, it's just a mask for how much they hate themselves. But I no longer talk to him, he started hurling judgment and insults upon me (even though I was always nice to him) so I dipped.

This is why I don't get close to anyone. They will ALWAYS turn on you eventually.