Or more objectively, they see murder rates literally doubling from 1964-1974, a rise never before seen in American history. They see a massive drug epidemic and an entirely unprecedented breakdown in the family unit that results in literally millions of children born to single mothers. They see a collapse of social institutions coinciding with an again unprecedented rise in suicides and antisocial activities. They see cities like Detroit, Newark (and to varying degrees nearly every other major city in the US) begin rapid declines that haven't been reversed to this day. Then they look to every other Western country that experienced the same "counterculture" in the same period and see these same issues to a similar or even greater extent.

It is either incredibly ignorant or intentionally dishonest to pretend that the 1960s counterculture was some uniformly benevolent force for peace and love, and says a lot about the person claiming so's lack of ability to see anything outside their contemporary/status-quo perspective.