I've had a similar experience. I built out a feature using an LLM and then found the library it must have been "taking" the code from, so what I ended up was a much worse mangled version of what already existed, had I taken the time to properly research. I've now fully gone back to just getting it to prototype functions for me in-editor based off comments, and I do the rest. Setting up AI pipelines with rule files and stuff takes all the fun away and feels like extremely daunting work I can't bring myself to do. I would much rather just code than act as a PM for a junior that will mess up constantly.

When the LLM heinously gets it wrong 2, 3, 4 times in a row, I feel a genuine rage bubbling that I wouldn't get otherwise. It's exhausting. I expect within the next year or two this will get a lot easier and the UX better, but I'm not seeing how. Maybe I lack vision.