Conversation has moved a bit but re The North Water:
Satsuki - "I have a postgrad American lit degree so am familiar with "what is called American realist literature" in general and I enjoyed the book."
OK then, I guess you can say that you are somewhat familiar with the genre 
"Civilisation vs savagery/the amorality of nature and human nature etc etc - Did you find it subtle?"
No, those were obviously the main themes of the book. But you talked about an unsubtle point that the book was making and I wondered what you felt that point was.
"a man smells of "crotch", blood spurts, blood spurts, blood spurts, on and on."
I thought that was a pretty good description, actually. And blood spurts are entirely to be expected in the scenarios that were described, I would think. I didn't find any of that disturbing, tbh.
What I really want to say in this post is that it's amazing how different people can get a totally different impression from the same book. And what I mean by that is.....
- SPOILER - SPOILER - SPOILER - SPOILER - SPOILER - SPOILER - SPOILER -
"Drax felt quite 2d villain by the end."
I thought exactly the opposite. He was a textbook villain until the last 1/3 where our protagonist goes through his own trials of survival and finds himself changed by the experience, his thought processes and even his character approaching that of Drax. By the end of the book, he is not just an evil villain, because we understand how someone becomes a Drax.