Inability to control her emotions? I feel like we’ve watched different shows. She was overly defensive, yes at times overly aggressive, but obviously kept holding back tears, and certainly wasn’t unbalanced by her emotions at any point, unless you count the overall picture being so horribly misbalanced.

That to me was precisely so weird about it: until almost the end she seemed able to brush off Ramsay’s attacks as unwarranted, whereas what I’d perceive as a normal person would have had their armor pierced long ago in face of all the evidence, leading perhaps to actual momentary loss of self control (crying, shouting, leaving or smth) and possibly even towards accepting some of Ramsay’s advice. But for her, to me it seemed, protecting her absurdly flawless self-image was quite enough to keep her emotions mostly under check, hence the bizarre effect.