because "You are past your prime old man!" and "Why should we listen to a washed up has-been of a Starfleet commander?" and is frequently disrespected by the newer Starfleet officers.

The problem is, this is how the Left always treats old people that aren't politicians. The central feature of Progressivism in how it treats old people is exactly that: former Progressives who didn't change with the times and are now Conservatives. Those former-progressives are now enemies of the current regime, and their accomplishments deserve to be discredited by the moral failings they never knew they had.

So, like always, Stewart is talking to himself as a Leftist, rather than others.