Coming in late so forgive me if I'm rehashing. Two problems I see:
1)He can do, or can't do, whatever he needs to. I mean one issue he shoves the world out of the way of an asteroid, next issue he can't. One issue he can lift the aircraft carrier with out damaging it, next he can't. No real consistency.
2) Kryptonite, a supposed rare substance, is in the hands of everyone and everybody it seems.