For thoses wondering, Yohan's family is complicated. Yohan doesn't really see himself as the favorite because for him his father is just a hypocrite (which is right). But if i remember correctly his mother do care about him.
His father assaulted him when he was in middle school but no one know about it except his father and the housemaid (Even Yohan doesn't remember it).
His parents do care to a certain extent but Yohan is a weirdo in general and they also care very much about their image, but since Yohan is complicated they "exclude" him to keep the perfect image their family have.
In the point of view of Yohan, he doesn't feel loved by them that's all
