I'm sure this book resonates with many people but here in Australia, as someone with a few years doing primary teaching, I just found it rather irritating. Perhaps in Britain the schools are absolutely filled with unhappy children with clinical anxiety, depression and self-harm issues, but I don't think it's fair to paint our schools like that. I'm 100% not disputing that these are real issues and are found in young children and adolescents, but I'm not convinced our school system here creates massive, widespread problems like these.
I'll admit I only read half the book, the library wanted it back and I didn't really want to finish it. An example of one thing that got up my nose was a section on "Trads" vs "Mods". The Trads only value Maths and English, while the Mods have a much more nuanced view of the world. The Trads put down anything that isn't classical, while the Mods understand that children also need to learn resilience and social skills. And then they decide that Trads like to create straw men arguments to discount Mods! Talk about pot calling the kettle black! They claim Trads don't like to actually visit schools because what they find doesn't match with their thinking. At that point I lost interest in this diatribe.
I grant you, if you attended a school with a very old school way of looking at education, and you were more of an artist than a mathematician, you may read this book and "yes, that's exactly right!" but this view of the world was not my experience in school as a student or a teacher. The book tries to paint everything as black and white, which I thought really undercut their own argument.