At the start of game Corinne never choose mc between mc and someone else. You call that healthy relationships when one side ready to give attention but another not, even friendly?
I don't recall saying they have a healthy relationship, but there is hell of a long way between an okay friend and being bad because you don't share feelings towards another. Turn it around and see that so far she is one of mc's only friends, so even giving him some attention is something. I am not arguing that she is perfect or great, just that she isn't bad for "friendzoning" him, unless she takes advantages of him, which we don't really see. Maybe when she wants to split the speeding ticket.
Mc had 18 years birthday, Corinne: "Hey, gal, you right, lets go party with couble douchbags".
So? It is not like he invited her to anything. He wants her to drive him home and she can't because she has other things. Sure it would be nice to give the ride home, but again she isn't obligated and she is not bad for not doing it. How entitled do you feel in this situation? Be glad when you get a lift, accept when you don't.
She didnt even remember mc was adopted she need remind of that. Thats literally friendzone and without powers mc would must forget about her and exclude her from his life.
Maybe mc doesn't talk about it often, doesn't really say anything. Furthermore it is silly to say that exclude her from his life without powers, as he didn't have them at the beginning and he is still friends with her.
As for the cafeteria scene, it is literally possible to play a version with a non altered Corinne. She clearly wants to stay out of it and ask for the friend to drop it. So no, she doesn't approve, but she may let it happen to keep out of it.
Look, I am not saying she is everything, the greatest catch, but it is just such a bad way to perceive the world, that women are bad and are friendzoning you, just because they don't harbor any romantic feelings for you. It does no one any good thinking like that and it is really what I am arguing against.