This is:

Attention to spoilers!

I haven’t read, so I’ll ask. He is not there like everybody in the sense of "all people as people, and he is like the shit on the dish" or in the sense of "all piddars", and he is d'Artagnan? Usually in kigs and movies there is a second..
and...
The hero received serious psychological injuries in early childhood (fighting, starvation, mommy smoke cigarettes about him and all this at the age of 4), the results of which were pathological disgust for himself, fear of touch, the desire to keep everything under control, etc. and etc. Therefore, the BDSM relationship model has become optimal for him.
With the appearance of the heroine books in his life, he began to try to build normal relationships, which, as you understand, was not easy for him. And this is about the book, not about trolls, Imho.
And the heroine, as it caused from the very beginning the desire to swallow the taburet on her forehead, so until the end of the third book and did not want to.