A lot of the code it generates is trivial, or 1-2 lines of code that's obvious, at least for me. In which case, it makes no sense to modify it. I have a feeling this is the bulk of it.
Maybe I should have lowered expectations and thought of it as improved code complete. I got spoiled by copy/pasting from ChatGPT. As it stands now I'd rather pay for a subscription to have the latest ChatGPT than for Copilot.
Maybe it's just me.