@Taskerland There are oddities like the very long Parker series of novels, by Donald Westlake writing under a pseudonym ("Richard Stark"), where the protagonist is morally awful, his world has moral complexity (it's not the case that the whole system is rotten), and the books are kind of built around a viewpoint where ethics is everything. Just a kind of utter amorality (there isn't even an explicit rejection of morality; it's just ignored) rather than immorality or grimdark faux-morality, etc.