I've found I am naturally ignoring the large complex suggestions because they usually have mistakes, and accepting the small easy suggestions. I respect your experience though, to each their own.
Mine doesn't even make complex suggestions. I can't get it to suggest more than one line at a time. Wonder what's different? I'm on the beta.
For example, sometimes I'll start out with a code comment for a function, hit enter and the next line suggestion will be the entire function.
The thing can generate whole unit tests if you leave it a one-like description in a comment next to the function you want tested. It’s actually amazing.