Shut up and don't play it if you don't like it, jeeze.
Same goes for Half Life, jeeze.
By the way, the problem is exactly that it's nothing special. That wouldn't be a problem on its own, but what makes the non-Halo fans furrow their brows about it is that Halo fans follow it like it was the Ark of the Covenant or something, thus making the developers getting stuck up their own ass.