I'm going to assume you didn't play much Halo MP to even understand what the uproar is about.
And I'm probably right.
I didn't play a ton of it because it was never really good. The halo experience was an experience that had been available for years on PC in terms of twitch, mayhem shooting.
I think Halo 2 was the only one I didn't give a decent try to. The only time I really enjoyed any Halo was when playing on a single screen against friends.