I want to get revenge on someone in my minecraft realm because they screwed me over. I was hoping to get into their ender chest. Any way?

Um. Find their ender chest and do waht ya gotta do. If you can't find it then find it.

If it is your realm then you have owner privileges. Means you can do whatever you like. Just find the chest if it doesn't let you open it in survival, switch to creative or something youll be able to get in it one way or another