He welcomed her into his world hoped, she wouldn't ruin him. All the things she liked about him that she'd try to change or it all turns into hatred.
He didn't read minds, she was passive instead of talking about things with him. She would be supportive instead of doubting him. Making him feel bad because her values and focus was different from his.
He wasn't the same in the relationship barely able to focus on himself, how can he function for two. He didn't get complements so he wasn't use to giving them out.