Even justice system considers the trustworthiness of a witness, evaluating incentive, conflict of interest.
Having worked in another FAANG, I realize a large number of criticisms do come from imaginations, since I could see the contrast first hand. Nobody could tell exactly the consequences of all actions, most of the time it's just a buncha folks trying to figure out what to do, experimenting, iterating. Have you tried executing a conspiracy, like a surprise party? Good luck keeping a secret with more than 5 people.
There's also the problem of perspective. To a less technical engineer who don't know what they don't know, having their deliverable rejected time and again could feel like a conspiracy against them. If you read a blog post from them you'd think the culture is very toxic when everyone is doing their best juggling to be considerate while keeping the quality high.
As with others commenting on this, I've no idea how true the book is, in fact I have never read it. OTOH, even without the book, researches saying social media is making teenagers depress look convincing to me, and, although it's a losing battle, privacy matters a lot to me so I've personally stopped using social media for many years.
None of these give me full confidence to trust nor distrust the narrator, for things that you can't observe externally. It's all percentage.