Good Movies That Make You Feel Bad

These are movies that are very good but that definitely do not make me feel good at all in any way. They're upsetting and disturbing and make my whole body and mind feel strange afterwards. It's not necessarily that I wouldn't re-watch them but that I understand their motive isn't escapism or to make me feel better about anything. These are the kind of movies that make you look in on yourself at all the really nasty parts. If anything, the main emotions these films evoke are guilt, shame, and dread.
(Recommendations are welcome!)