I completely disagree. You watched it from a different angle than I did. I don't feel like the film was going for punch line beyond an uncomfortable initial chuckle. I think they were going for a classic comic feel to throw you off guard so that it would suddenly hit you that, "Hey, this isn't right." The whole Hit Girl thing was there as a counter-point to characters like Robin.
It's funny--I would've thought you would've liked Kick Ass. I thought it was fairly cranial and loaded with satirical commentary on the whole genre.