These posts really miss the mark.
This election was a referendum on neoliberal business as usual for the top 15% at the working class's expense. Every election from here on out is going to be exactly this until conditions improve for the bottom 85%. Until the DNC finally gets the message that they need to offer real material improvements to the working class without condescension they're going to continue to run unpopular candidates who lose to awful Republicans that at least have the courtesy to lie to the working class in order to secure their votes.
Stop finding scapegoats and start really looking at what went wrong or we're looking at 20y of faux-populist Republican administrations.