I wouldn't say this reflects on the YA genre as a whole -- the book seems to have been self-published. The publisher listed on Amazon (Sand Dollar Press) claims to be an indie YA imprint but pretty much exists just to print/sell that one book; I'm guessing the author set it up for that purpose.

I mean it's still shitty but I have a friend who works at a vanity press, and if I had a dollar for every repulsive project that crossed her desk, I'd be rich as hell.