I saw a review about it that made a lot of sense to me -- he's a professional guru. He makes his living selling "solutions" to "problems," so of course he's going to claim there's this big, mysterious problem with millennials.
People say that millennials have a higher rate of unemployment, for example, but it's actually because "millennials" still consists of people in the 18-25 range. Unemployment rates have always been higher among younger people, and if you shift the scale to include only older millennials -- those of us that are in the 26-34 range -- you find our employment rate is right in line with national averages. Additionally, if you look at all age brackets over time, you find that when the older generations were our age, unemployment rates were proportionately the same.
That, alone, makes pretty much all the other crap fall flat, because it's all based on the idea that millennials are disproportionally more unemployed, that we're lazy, entitled, brats who expect everything to be handed to us.
And supposedly, it was because of those stupid participation trophies. I don't know about anyone else, but I found any and all awards that I didn't feel I actually earned (that is, put forth hard effort and dedication) to be utterly meaningless.
What does bother me, though, is that I can't entirely stand up to some of the accusations of lack of social skills, but it's not because I'm a millennial, but rather because I'm autistic.