Patrick Rothfuss ruined other fantasy novels for me. Seriously, I usually now stop after 2-3 hours in because it is just bad in comparison. I know that there are some that do not like his books. For me those are the best fantasy books I have ever read. It is not even close. Like he is so much better that I can not even compare it to anything else.
For me it was the other way around. The first book was so bad that I stopped reading fiction all together because I realized there are more important things I can do with my limited time.
Unlikable mary sue character who constantly toots his own horn and boasts about how smart he is, boring cookie cutter world building straight from a how to book. This made the protagonist extremely annoying like a teenager who thinks he’s smart and talented because of good grades and then ends up working as a web dev later in life.