But I'm still not getting the "revenge" part of Keen's so-called revenge. Yes, Captain no longer attends this…
Keen probably wanted Captain to taste his own medcine. I am not sure if Keen wanted Captain to be expelled. I think Keen wanted to show Captain, that everything he did to others, can happen to him too. I actually thought for few minutes that Captain and Keen are over and nothing will fix their relationship, but then Keen was supportive, loving and call Captain "his boyfriend". I won't lie i was happy. But after rewatching the episode again i am not sure if they really fixed their relationsip.