Unrecommending A Cosmology of Monsters by Shaun Hamill because it takes an interesting setup (the protag's family has been haunted by appearances of a monster, which is quickly followed by Misfortune of some sort befalling them, and the main character breaking the cycle by embracing the monster as a child before he knows any better and actually befriending it) and bashing anything interesting about said premise to death with a brick (the monster is also a Hot Woman sometimes and has sex multiple times with the main character when he's an adult, it turns out there are other monsters who all serve an Eldritch entity who feeds on human suffering but the one the protag fucks is the only Good One because the protag reminded her of her lost humanity), leaving you in a state where you aren't exactly sure what the Themes of the story even ARE by the time you finish it
This sounds like one of those stories where I'd start rooting for the eldritch abomination out of spite by the time I was halfway through it, yeah.
('the token good/redeemable monster is coincidentally the sexy conventionally feminine woman-looking one the protagonist can/does fuck' really shouldn't be common enough to be this much of a pet peeve, and yet)
