He feels frustrated and angry not because he so desperately wants Garam to escape Heejae - he’s mad because for him it’s impossible to accept that a man like the professor can be truly capable of love and care. It’s not even directed at Garam in reality, it’s at himself. Because if Heejae truly loves Garam then that leaves Compton with the horrible question “what is so wrong with me that I was completely undeserving of that love?”. That’s what abuse does to you: you hate your abuser but you also truly believe most of the time that you are somehow to blame for the pain you’re experiencing - and maybe you deserved it.
He feels frustrated and angry not because he so desperately wants Garam to escape Heejae - he’s mad because for him it’s impossible to accept that a man like the professor can be truly capable of love and care. It’s not even directed at Garam in reality, it’s at himself. Because if Heejae truly loves Garam then that leaves Compton with the horrible question “what is so wrong with me that I was completely undeserving of that love?”. That’s what abuse does to you: you hate your abuser but you also truly believe most of the time that you are somehow to blame for the pain you’re experiencing - and maybe you deserved it.