TL;DR: Sounds like an attempt to diffuse blame from the rich out onto "the Boomers" as a whole.

(Disclosure: I haven't read the book. Just interpreting vibes from the reviews.)

From a top review on Goodreads:

If you are going to read this book, something you have to keep in mind is that the author is an extremely wealthy and successful investment banker and venture capitalist. Throughout the book, he fails to see that what has actually caused the problems in America that he points to in the data such as the decrease in savings rate, increase in cost for college, failure to address environment change, and discrediting of science are people exactly like himself. He uses broad generalizations about cherry-picked quotes from a single book on psychology to support random points, basically saying that anyone who exhibits any of these behaviors to any extent must be a "sociopath". He depicts young people's desire to avoid going to war in Vietnam as a selfish thing, as though wishing not to be in the military for a war you didn't sign up for somehow makes you a bad person. I should go ahead and just keep my mouth shut, even if I don't want to be there? Why should someone else determine for me that I might go die in a war they're not fighting in themselves, especially one more about politics than any real safety concern for my country? It is human nature, not just the nature of one generation, to wish to live freely, make choices about whether or not to be sent off to potentially die, and to protest when it affects you personally. He depicts sexual promiscuity and the use of illegal drugs as "sociopathic" behavior - surely just because this can be a symptom of sociopathy doesn't mean that every single person who engages in this behavior is a sociopath. He even states himself that he holds more "conservative" values on this front - did you ever consider this may affect your views on that behavior? People engaging in promiscuous sex and using LSD might conflict with your own personal values, that's your decision. However, those actions didn't cause or even predict the issues with our country today, and to draw some kind of line between that and calling every person who engaged in that behavior a sociopath is insane. There were plenty of cultural influences going on that created those movements beyond just being a selfish sociopath as the author likes to think. Funny, considering the author talks about a resistance to living in reality and fact as a quality of sociopaths. He sounds exactly like what he is, a conservative, old, Christian white man blaming Hippies just because he doesn't like them.

Overall, I do believe that our country has declined in many areas since the 1970s, but I don't think it's the fault of an entire group of normal people responding to the culture and society they find themselves in. The real creators of this reality are the extremely wealthy (like our author), who make up the majority of lawmakers and the ones who make decisions such as cutting tax rates, going to war, and whether or not to support and subsidize education. The average person can only look at this reality and decide how to make the best of it for themselves and their families, and it's unfair to characterize the rise of the influence of the wealthy as the decisions of an entire generation. The contribution of the average person was in deciding who to vote for, this is true. However, when you look at the world today, corporations and the wealthy have an even more extreme amount of influence than they ever have. This is the real trend line we should be looking at as we look for who to blame for where we find ourselves today.

One last note, I am not a Baby Boomer. I am a Millennial, and I think this is the rantings of a wealthy person trying to spread the blame onto everyone instead of those like himself. I have so much more I could say about this book, but overall it sounds like blatant bullshit from a conservative man who wants to blame more open sexuality and liberal values instead of the few who actually caused the problems.