I’ve recently come across the trope several times and I’m getting extremely sick of it.

For one example, I read this quirky queer sci-fi fantasy with a perfect cast of unproblematic characters...when suddenly we met a new character...and she was RUDE to the perfect main characters!! I waited for her to be killed in instant karmic retribution but to my surprise...she lived for the rest of the book and it looks like she's going to be a main character of the sequel. Wtf??

As a second example, I'm reading a fantasy book about a schoolboy who's the chosen one and I'm thinking that I get where this is going right? The boy is gonna gradually learn about his powers, defeat enemies without much sacrifice, and it's all gonna be really wholesome. Imagine my surprise when they reveal that there is no "chosen one" and these fuckass wizards were just grooming this boy into their cult the whole time.

Why?? Why would an author pull the rug out from under a reader like that? Do they think readers WANT to be suprised? Do they think we want something unexpected to happen in our cozy fantasy books?? Well not me. This is making me lose my trust in authors to the point where I'll only be reading AI from here on out.