I mean.... okay; he doesn't want to deal with nobility. I get that.
But he is an absolute, solid, gold-plated, bastardly, asshole sonuvabitch to her.
I mean, he is a complete dick to her in a way that isn't even remotely funny; he's just an abusive prick from start to finish.
Because of how she was born, and through no choice on her part, she is who she is... and he has no ability to treat her as a person, due to her existence, regardless of her courtesy, thoughtfulness, or effort.
It's honestly kinda bullshit; like, if she cuts his arm off, well... at this point, I'd just shrug.
Cos he damn near deserves it!