I think a lesson the DNC definitely learned is never rig a primary if you can't rig the general. (And at this point, it wouldn't matter if they did, they're going to get accused of it by the Right either way)
I basically gave up any notion I had that Hillary was on the level (not that I had much of one) when they did the vote count early that day, Bernie one, so they just pretended he didn't and did the count again later that same day.
And second, yeah... the Media kept parroting that Hillary was a sure thing (Even as Nate Silver begged people not to trust his own site's polling)
I actually knew people who skipped voting altogether to go to a "Hillary Won" party... The look of shock on their faces would have been funny if not for the horror of what happened on that night. I think the most tragic was a friend of a friend who was bullied into suicide that night.
Her parents told her that "Trump won" and she's "Not allowed to pretend she's a girl anymore", and made it clear they'd point to Trump as justification to reject her trans identity... She killed herself very shortly after, it was...
Look when Republicans win, the consequences are literally deadly. That's not a threat, that's a warning about how dangerous America's true enemies are.