"Bad" is doing s lot of work in your sentence. Do you mean slow? Or buggy? Or unmaintainable? Or unextendable? Uses patterns the tech lead hates? Hard to read? High cyclomatic complexity? Doesn't meet requirements? Security issues? Uses out of date libraries? Too much reliance on 3rd party code? Too much NIH? ...

I think "one shot ready for production code" is what AI cannot do yet. Which is why I am not worried for another 12 months at least :)