The idea that current generations are less manly and morally upright than their forefathers is basically the defining trope of Roman literature.

Yup, when your founders were fathered by Mars and suckled by a she-wolf, you can only go downhill from there.

Interestingly, in Latin, a she-wolf (lupa) is slang for a prostitute.

For some inexplicable reason I feel that it is much more likely that they were nursed by a prostitute than by a wolf ;-)

I think that is the the defining trope of the older generation.

I don't know about the Romans, but here's an example from 1627 https://wellcomeimages.org/indexplus/image/L0020217.html

The upside-down "O Maners, O Tymes" is almost certainly a reference to "O tempora, o mores," used by Cicero to mourn the wickedness of his age (end of Roman republic).

I'm sure a quick reading of Aristophanes would turn up some humor against hipsters.

On the note of ancient literature, it's amusing to note that penis jokes have been around for over 2000 years, some things just never get old.

The Romans drew penises on everything, all the time[1]. They're like your friends, when you fall asleep at a house party

[1] http://www.redorbit.com/news/science/1113411682/ancient-roma...

There is a well known quote from Classical Greece where they are bemoning the youngsters who go around clean shaven :-)

Alcibiades was know for this if you have read your Thucydides