Inspired by another thread, which films would you consider to have awful endings? Maybe didn't go the way you thought it should or had just a bit of a flat ending?
Mine is No Country For Old Men where the relentless killer (played brilliantly by Javier Bardem) eventually catches up with the main character's wife. She is pretty much an innocent bystander who's only 'crime' is to be married to a man that made a costly and stupid mistake. There is no real reason to kill her, but he does anyway. He tries to get her to say heads or tails beforehand, iimplying that she could have lived. The killer is then badly injured but still manages to get away and isn't caught by the very end.