Flat characters, simple plots, way to much emphasis on trying to be sexy, acting wasn't as good as it could have been.
Archer being incompetent made sense to me really. I mean, so fans complain that he wasn't experienced enough. HELLO!!! Earth's FIRST true warp-ship, the first ship to actually go out there. There isn't a captain in this new Starfleet that has the right amount of experience to deal with this kind of stuff.