and how Millennials are the worst generation ever
You should listen to the entire quote, he is not blaming the millennials but pointing out what they inherited:
None of this is the fault of a 20-year-old college student, but you, nonetheless, are without a doubt, a member of the WORST-period-GENERATION-period-EVER-period, so when you ask what makes us the greatest country in the world, I don't know what the **** you're talking about?! Yosemite?!!!