This is an important and devastating book that lays out how the very design of large pornography websites is driving ever-increasing extremism in online pornography, which is having a real-world impact on how people experience sex in the real world.
I think the flaw is in how it is laid out, going through the various forms of harm coming from pornography, all of which essentially boil down to the author giving the titles of highly viewed pornography videos, how it is tagged, the algorithm driving viewers to more extreme content, and how that is increasing unhealthy behaviours in sex, and it goes without saying it's bad.
I also think it's a profound weakness in a book, looking at the harms of 'big porn' is that the author talks about meeting and speaking with senior members of tech companies and politicians, which is worthwhile, but never indicates that she has made an effort to speak directly to the women (and men) who act in pornographic films. The nature and structure of the book make it very clear that the author thinks that they must be subject to harm, but their voice being absent completely robs them of their agency and is a real oversight and disservice. For saying that indie porn has the potential to be positive, the author doesn't explore this in any depth beyond the introduction, which feels as though she wanted to make it clear this book wasn't a puritanical objection to all pornography, but it is never explored further, which is disappointing.
It is also very narrowly focused on the issue specifically of pornography, and it would be interesting to locate this issue in a broader consideration of online culture related to sex and gender and broader societal attitudes to sex and women.
It's an important book, but it feels too long for what it covers, and there are some glaring omissions that were disappointing.