Yes, as any old person will tell you, everyone is rude and disrespectful these days (by comparison).

The eufemism treadmill works bot ways. Eufemisms loose their politeness. Swearwords loose their strength (to be replaced by new ones). Language changes. I don't think people are inherently more rude and disrespectful.

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