Ender's Game (book or movie) is not Orson Scott Card; in many ways, it feels strange thinking that such a foul person could have written such a beautiful and painful story (which was brilliantly acted by young people in the movie). But he wrote it some two decades ago, when he was (presumably) not such an ass-hat as he comes across lately.
Do you have a problem with the movie? Consider Sturgeon's Law: "90% of everything is crud." I know a lot of people who would say the same thing about other human beings, that 90% of them aren't people you'd want to befriend. But if you deny yourself enjoying the 10% of stuff that's worthy of your attention because 90% of that was written by someone you find despicable (what's that leave, 1% or something?), you're in for a desolate life.
For more fantastic discussion about this, check out Tessa Gratton's powerfully personal post about this here. Also Bart Calendar's commentary on the issue of artist vs. art here.