I'm going to ruin 3 relationships
Why would you want to do that?
I'm doing it because I can.
I think that you should reconsider. It can severely hurt someone if you meddle in their relationship, especially on purpose.
Sometimes I feel like I want people to suffer. Maybe I think something wrong with me.
There is something wrong with you if this passes for "fun" for you. Get help and seek more healthy forms of entertainment.