If you try and one shot it, sure, but if you question Claude, point out the errors of its ways, tell it to refactor and ultrathink, point out that two things have similar functionality and could be merged. It can write unhinged code with duplicate unused variable definitions that don't work, and it'll fix it up if you call it out, or you can just do it yourself. (cue questions of if, in that case, it would just be faster to do it yourself.)
I have a Claude max subscription. When I think of bad Claude code, I'm not thinking about unused variable definitions. I'm thinking about the times you turn on ultrathink, allow it to access tools and negotiate it's solution, and it still churns out an over complicated yet partially correct solution that breaks. I totally trust Claude to fix linting errors.
It's hard to really discuss in the abstract though. Why was the generared code overly complicated? (I mean, I believe you when you say it was, but it doesn't leave much room for discussion). Similarly, what's partially correct about it? How many additional prompts does it take before you a) use it as a starting point b) use it because it works c) don't use any of it, just throw it away d) post about why it was lousy to all of the Internet reachable from your local ASN.
I've read your questions a few times and I'm a bit perplexed. What kind of answers are you expecting me to give you here? Surely if you use Claude Code or other tools you'd know that the answers are so varying and situation specific it's not really possible for me to give you solid answers.
