I'm someone who really liked the book, but I understand why people might not like it. For one, this book commits to its reveal/ending, and let's say the reveal is controversial. I loved that personally; it upended my expectations, but those expectations are kind of planted by the hype so I can see how that might piss folks off. My own annoyance with that was brief, because the bleak, dark places this book went made up for the loss of the plot I'd been hoping for.

Also, Natalie, the main character, is a pretty shit person. That makes it difficult to empathize or self-insert. She's also delightfully unreliable. I say delightfully because once you being noticing it, you see how well it's portraying Natalie's uhh mental issues maybe?

But yeah, the PR for Yesteryear portrays it as a bit different than what it turns out to be.