First of all, your conscious and hilariously disingenuous dismissal of AOC's upstart victory in not just defeating but utterly crushing a long time, entrenched and powerful incumbent like Crowley that had all the money and establishment backing in the world is noted. I bet you thought Engels getting completely toasted by Jamaal Bowman was totally insignificant as well.
Second, no; when it comes to policy positions, progressives are vastly (and increasingly) more in alignment with the general populace. If you want to talk performance in 2020, of all those Dems in competitive districts, the more conservative candidates tended to underperform:
The party is back to what it does best: blaming the left for its failures.
discourseblog.com
Just because you might prefer to believe something doesn't make it true.