I think there's a charitable and an uncharitable way to evaluate this book.
The uncharitable way: the plot is hilariously unrealistic; every twist is telegraphed from a mile away; the protagonist is a bizarre and gross amalgam of Mary Sue and self-insert; the writing is facile and (and this is being charitable!) won't age more than three years; any antagonists are one-dimensional at best. The book demands nothing of your mind and little of your heart.
The charitable way: it's kind of fun! The audiobook narration is excellent, the rabbit-holing into internet fame rings true, and the story feels silly in the same way an endearing anime does — yeah, it's a silly trip, but you generally like the people involved so you go with it.
I generally try to go with the Roger Ebert mechanism of criticism, which is asking "how well does the work accomplish its goals?" The book tries to do two things:
But this is the first of a series, and the real question is: do I want to read the next book? And the answer is yes: it was light (this one took me around half a week) and relatively fun and I could turn my brain off. But I certainly wouldn't pay for it.