Personally my... intense dislike, shall we say, of Moash came only after his "point of no return". I was fascinated by his chapters up until the Elhokar Moment (and after too, but in a different way). I didn't hate him, and was even hoping for an interesting redemption arc. Then he threw it all away for petty revenge, and then threw the rest out when he gave up his agency for that and future actions, and I think that's at the core of it. There's also something to be said for the fact that the Elhokar Moment was so intense and emotional that it can't help but color all future perception of him, at least for me.
Thanks all for a fascinating read that made me think!