Authors get bad reviews all the time. I've gotten my fair share as well. In hindsight, some I deserved. For some, the reviewer simply misunderstood the work.
And though I may disagree with a review don't ever, ever, ever do this.
I cannot tell you how self destructive this is. As the author rants and raves for what is not actually a bad review (the guy liked the story, but the grammar errors turned him off), not only is she endangering her reputation, but her future as a writer.
I admit. No author likes to have their baby called ugly, but whenever you share your best with the world, there are some people that are going to call your baby ugly.
And sometimes they might even be right.