And this, in a nutshell, is why I mostly read/review authors who are dead, or old/mature enough not to give a rat's ass about Goodreads. I do try to review everything I read, and my standard star rating is 3, which means "no, I don't regret the time I spent.". If I really liked it, it's a 4. A 5 for me is a book that actually changed my life, and I think I've used it three times out of 1100+. So I'm a hard marker. Boo-hoo.
But if some author were to take issue with me or my reviews, I'd give them exactly the amount of attention they deserve - none. Revenge 1-star reviews are also child