Fact is, Ds need to take a long, hard look in the mirror, because they spent four years calling Trump, Rs, and conservatives, racists, sexists, homophobes, and bigots; they expected a blue wave the size of the Thai tsunami and barely got one the size of stepping in a puddle.
Trump, for all they tried to paint him as the world's greatest fascist and white supremacist who ever lived, increased his electorate vote by every demographic other than white men. Yes, more Blacks and Latinos, and more than seven million more votes in the aggregate.
Blow conservatives out of the water, the Ds did not. The "pack the supreme court" "add states" "defund the police" contingent failed -- miserably.