At all the people who egged this kid on to fight him.
You are all -blam!-ing stupid.
Swap two kids fighting to two adults fighting and know what happens? Cops. Lawyers. Assault charges. And if the OP started it, he's getting canned by the system. He should have started documenting the abuse and escalated complaints through the teachers, to the principle and so on all the way up until a satisfactory resolution is reach, and to not stop until it's reached.
The "pussy" way out?
Sure.
But it's also the way that isn't going to land you in a heap of shit either.