The fact that a lot of people my age are all talk and no action. Not just Dems, but people that are left-leaning in general. The Bernie Bros. when Bernie last ran for President are a great example of that fact. Most of my friends claimed to support him, never actually went out to vote, and then had the gall to point fingers when it became clear that he had no chance in hell of getting the nomination.
The total lack of self-awareness is mind-boggling.