I wrote a rant to that effect the other day.
If we are going to discuss the primaries, my view is that we need to approach any discussion with these things in mind:
1) There is literally no point in re-fighting 2016
2) When we discuss our dislikes/disagreements regarding primary candidates, we need to do so in the paradigm that almost any of them would represent a vast improvement over the current occupant of the White House. Joe Biden is a better person than Donald Trump; Elizabeth Warren is a better person than Donald Trump; Bernie Sanders is a better person than Donald Trump; Beto O'Rourke is a better person than Donald Trump; I could go on, but you get the idea.
3) The Democrats are a spectrum. We don't universally agree on how to implement a national health plan; what role capitalism should play; whether budgets should be balanced; is the Third Way a bad or good thing; and many more. Even issues such as legal abortion and guns can cause disagreement. But In 2000, and again in 2016, people lost sight of what separates the Democratic Party from movement conservatism. Fundamentally, it is empathy for all people and common decency. As much as we disagree with FOX, we don't call it out as the enemy of the people. We don't mock disabled reporters. We call out supporters of racism. We don't believe that your money automatically qualifies you as being intelligent or a leader, and we don't believe your poverty is automatically a result of your laziness or your bad choices. We believe who you worship and who you love is your own damn business. We can all find fault with a candidate we dislike who has fallen short of these ideals, but again I point out that the enemy is those who want America to be a nation run by a cabal of nominally Christian wealthy white people that pays lip service to equality and democracy.