Mishima is a good kid. Don't understand why the game decides to frame him as pathetic, though. I really doubt all those mean answers you have would help his arrogance either - being firm is one thing, but a lot of your answers are sorta...mghkljhf;;
I'm surprised they underplayed Kamoshida's abuse, particularly since the game seems to be a critique of Japanese society. I was guessing he stayed in the volleyball team because he was afraid of disappointing his parents, the pressure to achieve something or at least FINALLY do something with his life...Or maybe I'm just projecting too much? But I feel maybe this is a common feeling in East Asian families, especially if you're a kid with no remarkable talent.
I did like the route they did take with him in the end, however; in some sense, they decided to focus on his past bullying instead. The development of his arrogance was understandable. It's disappointing most people fixate on how annoying he gets instead.
(endgame spoilers) cried when he literally saved the pt's ass from a GOD lol protag almost only gets to be mean to him ever. let him rot, Mishima
random side note, I can't figure out if he was Kamoshida's favorite punching bag or not