Not because it sucks, but because it lags way too much. It's much worse than Reach because Halo 4 lags nearly every match, the kind of lag where I walk past the same stop 3 times before it fixes. Reach had more "black screens" but at least that made it even for everyone. Halo 4 lag just messes up the actual gameplay.
-
I've barely lagged at all whilst playing H4 though I haven't played it in around a month or so.