I understand your being drawn to that work together mode. Politics is about coalitions.
But you should consider the point of view of many of us who no longer share the values of a Democratic Party that's been moving steadily rightward for almost three decades.
I'm glad Hilary lost insofar as Bernie Sanders (VT-I) achieves status as a largely unfiltered spokesperson who can proclaim, "Trump didn't win, the Democrats lost," with Tom Perez standing helplessly by. By staying on message, he's playing your party as much as it's using him.
I'm glad she lost insofar as grass roots activism finds its voice, makes considerable demands, stops falling for the D-Party bait and switch, and holds both halves of the duopoly accountable.
I'm especially glad she lost because she epitomized everything wrong with your party: distrusted as hell, cozy with oligarchs, platitudinous rather than substantive, beholden and bedazzled by big corporate money, and above all, convinced that liberals have no where else to go.
I say none of that to dishearten you. Go out and build your coalition. Just don't be so certain that your party is the only game in town. These are times of upheaval...and your party isn't showing signs of understanding the zeitgeist.