If you review Nixon's CHIP proposal (https://www.nixonfoundation.org/2015/11/the-nixon-comprehens...), you'll find a proposal that maps pretty closely onto the ACA marketplace that we now have available.
"Mostly shaped by Democrats with major proposals cribbed from Republicans" would be a more accurate assessment.
The fact that Kentuckians loved Kynect and hated Obamacare--which are the exact same thing (aka the ACA)--tells you everything you need to know about the Republican voting public.
Make up your mind.
(I am old enough to remember that Obama convinced the Democrats that it was better than the existing system, and that small progress was better than keeping the status quo or waiting another decade to have maybe, someday the numbers to pass a better bill)