It's slowly starting to turn painful the way Sun in Help Wanted 2 is being mean and frustrated because he's trying to push everyone away.
He's just so convinced that he's a monster and that he can't fight it, that he doesn't even try anymore, he's just being an ass with everyone to avoid hurting and being hurt.
In a way the fact that he was the sanest of the whole animatronic crew at the start is slowly driving him insane.
I just wish he had a friend to help him and comfort him eueueueueueu