If your published or public work gets reamed by someone else, congratulations! First, you're published. Second, enough people know about you to assume opinion about your work might interest other people. That's kind of huge, if you think about it. Something you created is well known enough that people who make their living writing about stuff other people wrote picked on your book as a title whose name recognition they could skate on.
And finally, if you must respond, take a page from Sandra Bullock. She didn't post a drunken diatribe on a webpage, she took the heat, and she defended her work without telling anybody they were wrong or too stupid to "get" her.