I'm a connoisseur of getoffmylawnism. I find it fascinating, especially as a notparent who assumes that most (or at least many) of the people hating on the young are parents. I'm old enough to have been through 3-4 waves of this: Gen X, Millennials, and Millennials Round 2. Before that was the Me Generation (70s), and while I don't think the "Yuppie" thing was quite the same, it was related.
Still I find the intensity of the hatred towards young people now to be new and persistent. It's a phenomenon that tends to come out during economic downturns. Those lazy Gen X slackers didn't work (there were no jobs!), Millennials didn't work (there were no jobs!), Millennials Round 2 live in their parents' basements (there were no jobs and the rent is too damn high!). This time it's persisted and it hasn't faded away. Young people are horrible, and everything is all their fault.