I had that issue with gpt-5 that when it wanted to do something in one way that was just plain wrong in this project, and no matter what I said it just kept doing the same action.

it was completely unsterable. I get why people are often upset by "you're right" of Claude models, but that's what I usually want from model.

I guess there is different in expectations depending on experience level of developer, but I want to have final saying what is the right way