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.
I devoured Night Circus as a teen, but Starless Sea took me almost a year to get through. It really picked up for me in the last third, but theres like 400 pages of vibes to get through first. It’s a tough read for sure, despite how much I actually liked it.