if you haven’t already, read the Podesta emails and we’ll talk.
Also, when did the DNC become the arbiter of who gets to become the nominee?
I thought it was the voters who get to decide while the corporation stays neutral.

Your argument misses some very big problems of the 2016 primary that have only festered within the party.

Ben Warren recognized the problems when she was on the record regarding superdelegates:

“Massachusetts State Democratic Convention in Lowell on Saturday, Senator Elizabeth Warren sided with Bernie Sanders in the ongoing fight over superdelegates in the Democratic primary.
Sanders hopes to defy odds with turnout: 'California loves a comeback'
“I’m a superdelegate,” Warren said, “and I don’t believe in superdelegates.”

Way back machine

She seems to have changed her mind since.