I disagree with that entirely. Flash is absolute trash but wants to be, and it is entertaining trash. It is ridiculous to give more credit to a film that attempts to be serious horror and ends up as hilarious bullshit than to a film that wants to be trash and SUCCEEDS at being trash. How can that possibly work, Method?
Similarly, a good film can be ruined by its intentions for me. I long ago stopped enjoying Shrek because it is a product of sheer spite against Disney. It's funny, yes, but it's one of the most mean-spirited films I've ever seen.
Still, I wouldn't call Flash a 'good movie.' A cult classic, perhaps, like Troll 2 or something.