All those movies you see that just make humanity seem like a failed experiment
  1. The Act of Killing
  2. Beasts of No Nation
  3. Funny Games
  4. Grave of the Fireflies
  5. I Spit on Your Grave
  6. Irreversible
  7. Eraserhead
  8. Hotel Rwanda
    Suggested by @samandreacchi
  9. Blood Diamond
    Suggested by @Starmist