I didn't hate it but I can't really say why I liked it either. Maybe it is just the nostalgia. There is a very small window where this novel can be relevant: while Facebook is still a thing and its users are old enough to remember the 90s. And I think that may be all there was that kept me reading: 90s references - even when it felt forced.
And oh my god did it sometimes feel forced.
The characters weren't great so it must just have been the nostalgia. But if that's what you want in a novel (and you're a Gen Xer), I would suggest Douglas Coupland's Generation X or Shampoo Planet. These novels were actually published in the time period they're set in but it's still a better experience.