I didn't know this kind of thing went on, and it's depressing to see it in action. The author discussed it in a protected-to-friends post on Facebook. It doesn't surprise. I assume with the slack standards of DIY publishing these massive sites use that just about anything could be a review, including a misleading and untruthful cultural-war declaration from someone opposed to an author's existence. Most reviews of the work are overwhelmingly positive.
When people think of things getting worse, I imagine this kind of reaction being seen as a non-laughable way to push back against a Bewitched episode or a Bugs Bunny cartoon, and I start to think that things may indeed be worse in some ways, even as they've become better in others.