The Dem party was actually progressive in the 60s.
Moreover, I'm not sure why you're such a cheerleader for the establishment wing; which policies do you agree with them on specifically that are in contest/at odds with the FDR faction? Or is it more that you just despise the latter's ideas?
We do feel the Bern; now more than ever. Bernie's movement has only gotten stronger, and continues to build momentum. Despite immense obstacles and the establishment wing trying to stifle and suppress it at every opportunity, it has built immense momentum and has nonetheless increased its power and influence.
Pelosi was and is the definition of a consummate corporate Dem, who among and by the standard of her party consistently leans right and whose biggest claim to fame is being a great fundraiser; she's deeply unpopular for good reason.
Rashida Tlaib, a Bernie candidate, won in a crowded primary and is running for the House unopposed, as did James Thompson, Jamie Schoolcraft, Matt Morgan and Robert Davidson, all endorsed by Cortez. On August 9th, the progressive Dem groups Our Revolution won most of their races, and Justice Democrats (which are concretely and unambiguously pro-Bernie/AOC policy) won 6 on Tuesday alone, but based on the vitriolic and marginalizing stories published at the time by most mainstream press, you can be forgiven for not knowing.
The FDR/Bernie take over is well in progress, and it's thus far happening faster than the corporate/third way subsumption that occurred from the mid 70s to the late 90s; remember, this movement is only 2 years old at this point.