Oh jeez this is a tough one... this probably can change from day to day but most consistently (and probably most cringeworthy lol) is his relationship with the concept of love, just because he goes from not really giving or receiving anything meaningful until after ARR... like even the welcome he receives when he meets with the Scions for the first time is more than he usually sees. It's not that his family in Kugane doesn't love him, but everyone back home is on the "learn to take care of yourself by yourself" mentality, for better or worse, especially once W'htal got to adulthood. Romantic, familial, platonic... all those he has a better understanding and appreciation of now, especially after Endwalker. Idk. I told someone that really he's just a guy who honestly had a lot of love to give, just didn't realize it, and just needed people to give it to. He's still an asshole, but if he cares about you, he cares a lot.