Why did you do that to him?

What's wrong with jisuh, why is he being jerk to Sunyool? Didn't he even notice that Sunyool actually help him before like getting him into the play and making him progress with the seme? He has actually do his part even tho the only mistake he's done is falling in love to jisuh. Sunyool tried hard to change too. Poor baby (T⌓T) look at his reaction. He doesn't deserve that!