Yes, it's true. They did make Hades a villain (although he wasn't the main villain, since the person who stole the lightning bolt was somebody else entirely) and Persephone did hate him (and not only that, she was portrayed by Rosario Dawson as a promiscuous adulteress who hit on Percy's satyr friend -_-).

Just out of curiosity, why aren't you and Chris Columbus on the best of terms? Is it because of the Harry Potter films he directed or something else?