[MrMember]

>The children now love luxury. They have bad manners, contempt for authority; they show disrespect for elders and love chatter in place of exercise.

The above quote comes from ancient Greece.

[Twirrim]

https://quoteinvestigator.com/2010/05/01/misbehave/

There's some doubts to the veracity of that quote, which is why I opted for anecdotal when it came to older evidence :)