“ It was telling when the Democrats lost to the single most beatable presidential candidate of all time in 2016.”
I think you mean ‘the second most beatable presidential candidate of all time.’
The Democrats lost because they fielded the most beatable candidate of all time. And as if needing to underline twice their unfitness to govern, they helped that despicably corrupt person cheat out of the nomination a candidate who could probably have won.
I’m not saying Bernie would have been any better as President than Trump or Hillary. If the years since 1990 have taught us anything it is that in the USA, Britain and anywhere else in the developed world, the elected leaders are not in control of government.