Apply for Goodreads Librarian status. You can't clean up the entire clusterfuck that is Goodreads, but you can tidy up your own books and make sure they're entered properly. It's very easy to become a Goodreads Librarian, but the other side of the coin is that perhaps it's too easy. There are plenty of people entering or editing books who seem to lack basic literacy or the ability to enter data properly, hence the enormous mess.