that left tens of millions without health insurance
At this rate, it's highly likely that there will be more uninsured in the U.S. over the next few years than over the last few years. That's what happens when you make a product significantly more expensive and more difficult to sell and to purchase.
If you think things are bad now, wait until next year when the business mandate that Obama unilaterally delayed kicks in. That's going to be even worse for the people who already had insurance....
The real question is why the Democrats needed to take over the entire health insurance industry if the goal was to just help pay for insurance for a few million folks that didn't have it and wanted it. You could have covered that with a check just out of what's been spent on the federal and state ACA exchanges.
The reality is that this has always been about the Dems making a federal power grab over health insurance and the health industry. That was never going to do anything but make the already massive government-induced problems in the insurance and health industries worse.