I'm one of those that like Hawthorn over the top character. I did find her to be engaging and I think the author really translated (at least to me) how lonely she was, which I think is the main subject of the book. 
 I just didn't really like the "relationship" with Enzo, as soon as it turned out "romantic" (if you can say so). It was pretty unhealthy to begin with, on Hawthorn's part because of her reasons to talk to the guy, but if a true friendship have had emerged, I would have liked it. Instead, we got a borderline creepy thing instead but nobody seems to care, save for some "protective brother" moments... 
 Anyway, I did enjoy the writing and Hawthorn as a character, and it was pleasant to see her evolve a bit from her (many) mistakes.