Well again that is just a "vibes" explanation with nothing concrete.

I feel like with LLMs, it's like a situation where you are close to some feature or project and have a pretty good idea in your head already of how you'd implement it yourself "I'd do this and have an API with that and a database table foo for storing bar with index on baz" and you're keen to get started on it ...but then someone else gets assigned to work on it not you.

They do it a totally different way than you would have thought of doing it, and the code feels alien and weird because it doesn't follow your "design" and decisions you already had in your head before they started work on it. Is it "bad" or just not how you'd have done it?

I think that is ok. So long as the code works and meets all stated requirements and is secure and performant and uses good abstractions and is not full of hacks, then it's ok to let go. Sure maybe you'd have done it a different way but ultimately that doesn't matter.