Got some evidence that progressives were the problem? Exit polls have been pretty clear in recent elections as far as I have seen. Without support from the vast majority of progressives, Democrats wouldn't even be relevant. How about Democrats starting to earn that loyalty?

Bill Clinton is largely responsible for dismantling the federal welfare system. Obama let Wall Street use the mortgage crisis (that they caused) to drain even more wealth out of the middle class. He also set in motion the monetization of healthcare that's just now accelerating into a massive disaster. Let's not forget that Bill and Hillary encouraged Trump to run and the media to follow him because they wanted a real asshole to run against. Offering anything of value to the American people wasn't an option, so they needed an opponent that couldn't win, and that turned out great!

Quit trying to shove their failures onto people who have been telling Democrats how to win and have been largely ignored or blamed for their failures.