That not entirely accurate. Just a wander through the wiki on the history of the ACA shows what happened, both the efforts and roadblocks, the improvements to what was before, as well as the limited time frame.

Isn’t Obamacare really Romneycare with Democratic support? They compromised so much to get it through. Manchin and the like, the thorn in the Democratic party. But yeah, Berniecare would be much better, partly because I think he cares a lot more than a lot of politicians.