Oh and when did they conclude it was unworkable? When Obama proposed it? You couldn't show a verifiable source that shows dis-ownership of this plan before Obama and the "democrats" proposed it in 2007/2008 if your life depended on it.
The ACA is nearly word for word the Heritage plan. The VERY same plan the Republicans under Gingrich counter proposed to Clinton when Hillary was pushing her healthcare overhaul to congress. And it's the very same plan the GOP and Heritage both endorsed and supported as a "market based reform of the healthcare system" when Romney created Romneycare and right up until Obama was elected when it was suddenly unworkable.
And every time someone like you tries to deny the history there is going to be someone there pointing out that this IS the republican healthcare plan (and also the reason they never proposed a counter to Obamacare). Had Romney proposed it instead of Obama it would be being touted from the hills as the work of the Heritage foundation and a "market based reform" that places "responsibility to pay for healthcare on the people using the system" and endorses "individual responsibility" and all the other buzzword phrases the Heritage foundation used when they created and supported it.
You can still hate Obamacare, even if it was born by Conservatives on the libertarian GOP side funded by the Koch brothers. That doesn't mean you have to like it, unless you are one of those mindless freaks that thinks that just because someone on "your side" created it that you have to like it or you were one of the people that drafted it. But there is no memory hole, you don't get to rewrite history.