Eh, the script was all kinds of distinguished mentally-challenged. Krypton didn't explode, so Superman spends most of the film locked in aerial super battles ala Dragonball Z with Kryptonians who come to Earth to kill him. The film starts off with a news report of Superman getting his ass kicked in Gotham.
But it has all kinds of problems. His death is handled pretty horribly, Lex Luthor is an alien, Jimmy is a not-so-subtle flamer, Ma Kent gets raped, Supes' suit comes out of a canister like Venom's symbiote, etc.