The problem with eating your own dog food.
I do want to call out one portion:
Here's the real, non-ideological difference between Republicans and Democrats:
Democrats by and large are convinced that no one actually supports their agenda, and they devote a not insignificant amount of time and political capital to explaining to their own constituents why they cannot pursue goals that a majority of them support. ("I supported single payer since before you were born," says Nancy Pelosi, who has the legislative and leadership record of someone who may support single payer but clearly doesn't actually expect it to happen in our lifetimes.)
Conservatives, especially those who came up during the Obama era, have, more or less, the opposite problem: They've convinced themselves that their agenda is hugely popular and that everyone supports them.
There's actually been some research on this: Politicians--both liberal ones and conservative ones--believe that the electorate is more conservative than it actually is.