Kids was incredibly fucked up, but I kinda admired how strongly it made you not want to be anything like those characters if you were their age while watching it and IMO it should be shown in high school sex ed classes.
There are certain scenes in Game of Thrones that I can't watch again. Red Wedding, the creepy shit between relatives, Oberyn vs. The Mountain, rape scenes, deaths of dogs, etc
Even though Badlands isn't necessarily shocking enough to be horrific, something about how the movie's main characters are portrayed in a beautiful and unjudgmental way during their murder spree unsettles me more than most movies about serial killers that DO try to be shocking. Way too bleak and sad to be enjoyable, but I respect it.
I can't think too much about this without getting depressed so I'll leave it at that.