I have two. The Ritual and Drowning.
The Ritual is pure smut. 61 chapters and every one contains a graphic, demeaning sex scene. I’m convinced the author was an adult film screenwriter and decided to try their hand at writing a novel. There isn’t a single likable character in this book.
Drowning isn’t a great work of literature. I felt that the characters were very two-dimensional. I hated how naive the author made the protagonist. It made me have a lack of sympathy for her. The ending was series finale of Dexter bad.
Nineteen Claws and a Black Bird by Augustina Bazterrica. It’s a short story collection from the author of Tender Is The Flesh, but the stories go nowhere. Some aren’t even stories as much as they are fragments of thought with no plot/action/resolution. I’m not sure if there was a problem translating this book to English, but the version you can buy from Barnes and Noble is awful.