First, who did taught them about all that, that annoys you?
Secondly, maybe try seeing more people under 30 regulary with an open mind. I am sure you will eventually find someone not engaged with that. Just like you can find people over 30, who are still open to the world.
1. If the youth is messed up, it is the fault of the older generation who failed to teach them right. That would be you and me.
2. Maybe you have distant memories left, when you yourself were young. Do you think, you would have liked to learn from someone, who thinks all young people are stupid?
Secondly, maybe try seeing more people under 30 regulary with an open mind. I am sure you will eventually find someone not engaged with that. Just like you can find people over 30, who are still open to the world.