Very early on, he was seen as a mean, kinda tough guy feared by other students, but not too long after that (thanks to Sue Ellen dealing with him, at least?) he became friends with Arthur and his friends.
The same sort of thing happened to Harold from Hey Arnold!
He was,at first, as mean as any other bully. But later, they developed his character with episodes focused on him that made him more sympathetic and he eventually became good friends with Arnold.
In all fairness to him though, that's not really his fault. I mean, he commands a bunch of sucky comic reliefs who can't hit the broad side of a barn. You kinda feel sorry for the guy.
I find it funny that some of the more talked about examples of this phenomena are Seth McFarlane characters. Kinda pointless to compain about that since he was never interested in character develpment in the first place.