The portrayal of the near-future in this book is very believable.  There was a lot of 'telling', and not a lot of 'showing', and it 100% felt like Doctorow wanted to get some things off his chest.  I get it.  Climate change makes me furious, frustrated, and exasperated too.  Overall I was convinced by the imaginative take on what our climate-emergency world may look like in 80ish years, and the kinds of cultural revolutions that may result.  The Flotilla was perhaps the most believable part - I'm kinda surprised it isn't already a thing.  The main character was very saccharine (he uses the word smooch ALL THE TIME), and read as very YA.