Parents are being too restrictive HELP

Im nearly 15 and have been exposed to much MA-R rated films over the pasty few years. However out of nowhere my dad has restricted all my television accounts so that I am unable to watch the shows I have been watching since I was 12. He thinks that he is protecting me for something but I don’t understand what. I can’t I see what I’ve seen.

Does anyone else think this is unreasonable?? HELP PLEASE❤️