From Clyde's video, basically, dude is a manipulative, arrogant bastard, will throw his friends under the bus whenever, manipulates people to do his dirty work and do to things for him when he can't do it himself, like write his scripts and edit his videos because he's incapable of doing so or get people to do debates for him. He's easily jealous whenever someone gets the upper hand over him, is incredibly petty, bullies the living **** out of his own friends and even exposes their personal details publicly. And just generally treats his friends and workers VERY poorly, insulting them often and pressuring them a lot. Has also just randomly kicked people out of his servers for no reasons and some of the people working for him, like the Naruto Vs ichigo animator, went to see a psychologist because of him. Bro sets up dramas so he can laugh at his friends getting publicly humiliated and even poked fun at Clyde's depression.
He's like that one toxic friend you used to have in school that you cut off communications with as you grew older because you start to realize how much of a bitch he was.