When older people complain about supposedly whiny, entitled, self-centered and disloyal young people, exactly one work comes to mind: Projection.
We came of age while society fell apart. We're in our 20s and won't be able to own a house or have children until our mid-30s, due to the still-absurd housing costs, absent job security, and lack of a decent health care system.
The Boomers were born into an affluent, forward-looking society in which it was embarrassingly easy to advance. You could be a pot-smoking hippie dropout at Woodstock in '69 and a CEO by '75, whereas we have to start racking up internships (unpaid, in most industries) in high school. They inherited a society that would go forward and achieve great things so long as no one came along and fucked it up (as the Reaganites did). We inherited a giant, potentially intractable, mess.