You should try GPT4. It does use very reasonable variable, function, method class names. And if you point out that the code doesn't match your intent, it comes with new code fixing your issues.

The code it generates is by no measure "a huge pile of spaghetti code with cryptic names and conventions".

I was sceptical myself before trying GPT4. I asked it to change the Python C internals for a new feature, and googled to ensure the description doesn't exist anywhere. It came up with very good changes and explanations.

And this is all not even mentioning the pace of improvements. It didn't take too long to go from GPT3 to GPT4. Even if the pace slows down, it is still huge.