Oh, this is a hard one to rate. I'm quite sure others would give it more stars and it's a bit of a toss-up between 2 and 3 for me. It definitely deserves more (4 perhaps) for the narration, which is excellent.
This reminds me of the Wild Card books (of which I have struggled through one). It sits in the subgenre of superhero fiction which some would, I'm sure, describe as 'realistic' and I describe as depressing. I honestly believe that, had I been reading this myself, I'd have dumped by the midway point because nothing good happens for the first 5 hours or so. Things pick up a little after that, but it's a bittersweet novel throughout and I'm rather glad to get to the end of it. I seriously need a comedy after that. This is a grimdark superhero novel. It's what you'd get if George R. R. Martin was writing for DC (oddly, Martin is the editor of Wild Cards), minus the incest.
I also happened to suffer from some shattering of immersion at times. One of the instances of that comes very early on when our hero crushes a car. In a straight-up comic book, I would have accepted the description, but this book tries to be sort of realistic, so it came across as physically ridiculous. Basically, if this lad could do what was described, he'd be cracking the pavement with every step he took. You try leaning on the roof of a car; doesn't matter how strong you are, you'll lift yourself before you flatten the vehicle. There were a couple of other descriptions which just bounced out as wrong without warning, jarring me out of the narrative.
So, if you like superheroes and Game of Thrones, this might be a good choice for you. Otherwise, you still might like it, but you have been warned.