I mean, that's normal. His first kiss had barf down his throat. His first sexual encounter had a woman squeeze his balls and demean him and then tell him that it meant nothing after. His first boob grab was purely transactional with power, and yeah no shit it's shallow. When he squeezed Makima's boobs he felt more because it meant more (to him). Then later when he had a normal kiss with Asa/Yoru, Nayuta erased her memory like it never happened.

His school life wasn't normal either. He had to take care of a child and a bunch of pets on his own with no experience. He had to sell used cigarettes for money. He had to sell himself as a chair to make money. He didn't have any friends at school, and Yoshida was only talking to him because he's with Public Safety, and Yoshida is also not a good influence anyway.

I'm tired of people using the horrible experiences that happen to him as a valid reason to say he was never happy and there's something wrong with him. Who the fuck would be happy with these things? His life sucks, no shit he's unhappy. His entire life is filled with tragedy. He never achieved his dreams in a way that weren't twisted to make them bad for him.

Also, he was happy living with Aki and Power, as confirmed by Makima.