I really hate my girlfriend's ex and I really wish he would just disappear.
What's your reason for hating him so much?
I just don't like the way he treated her.
You should not hate someone that you do not know. I get that there is history there, but it seems silly to harbor so much hate.
I'm going to try and dislocate his shoulder
I understand why you feel that way, but you shouldn't attack someone because of what they did in the past. I think it would be best if you forgot about this guy, and spend time with your girlfriend instead.