"Perverse" for movies and scenes
For something that is hard to watch, you could say 不堪。变态 is okay, but I think it's usually used to describe people, not scenes and things.

For example, i think you could say something like this:


  Joffrey 拷打妓女的场面很不堪！


This is what my Chinese friend told me when I asked her, anyway. In casual conversation, 变态、不堪 should both be okay.