This article described the movie The Graduate, which everyone felt described a generation coming of age in the 60s. Pick other movies and books for other times.
Take it far enough back and you have this quote
"Our youth now love luxury. They have bad manners, contempt for authority, they show disrespect for their elders and love chatter in place of exercise; they no longer rise when elders enter the room; they contradict their parents, chatter before company, gobble up their food and tyrannize their teachers."
which sounds contemporary but dates back centuries (often attributed to Socrates, but not likely that old). It sounds contemporary in every time.
I conclude things aren't suddenly getting worse -- http://joshuaspodek.com/arent-suddenly-worse -- which makes my life better.