Looking for books with a "the world is dark but we are not" vibe
I think Lily Mayne's Monstrous books are a good example of what I mean. I am perfectly happy to have a world that is very unkind, messed up and unpleasant to live in (on some level or another) - I love paranormal/scifi/fantasy but I'm open to most genres, so the nuances are flexible for me. But I want the relationship itself to become a light in the storm even if it doesn't start that way. So it could very well start off even as hardcore enemies to lovers or have morally questionable characters, but the point is that the relationship itself is a positive. My personal main issue with dark romance is that if the relationship makes me feel "these people shouldn't be together and maybe even don't deserve it", I don't enjoy it as a romance (to me that's horror, and I have different expectations for it), and it's a shame because some of them have interesting premises. I can only think of two book series that toed that line successfully for me.
Hard no: Poly/ENM, Cheating, Incest, Noncon, Abuse between leads
Usually not a fan: Love triangles, billionaires