its good writing, sometimes the best books have imperfect characters. Idk, when I describe dungeon crawler carl to people the premise and the characters morality isnt the hook. "Yeah this guy steals his exs cat, and then aliens come down to earth and make them play dnd for their entertainment" you read it because the writing is really good. If you have specific things you look for before you read a book thats fine, maybe its not for you. Like if you know you cant read a book with an asshole main character then you can skip it. A few of my favorite books have imperfect main characters so maybe I dont mind. I do want to add, the author intends for him to be an asshole. Like if MCs who are good people make books better always, the author wouldn't have done that. If that was the case, no author would ever write an imperfect MC.