"Our sires' age was worse than our grandsires'. We, their sons, are more
worthless than they; so in our turn we shall give the world a progeny yet more
corrupt." - Horace in Book III of Odes, 20 BC

"Never has youth been exposed to such dangers of both perversion and arrest as in our own land and day. Increasing urban life with its temptations, prematurities, sedentary occupations, and passive stimuli just when an active life is most needed, early emancipation and a lessening sense for both duty and discipline, the haste to know and do all befitting man's estate before its time, the mad rush for sudden wealth and the reckless fashions set by its gilded youth--all these lack some of the regulatives they still have in older lands with more conservative conditions." - Psychologist Granville Stanley Hall in The Psychology of Adolescence, 1904

The "kids these days" trope has been around forever. We have documentation for centuries of aging generations complaining that the young people are simply the worst. They have no respect. They've lost all sense of discipline. They're impetuous and impulsive, self-absorbed and self-indulgent. Millennials, millennials, blah blah blah.