and suddenly when they are in a position of actually enacting a repeal and replacement bill into law they came up with nothing.
It's even worse than that. They've had how many years now to sit down and think about a replacement plan, to go through the details, crunch the numbers, and get their party on board with a plan so that when they eventually could put it into action they could succeed. Instead they did nothing and tried to push out a cobbled together mess that they couldn't even get enough of their party behind to hold an actual vote on it.
Both of our major political parties are completely dysfunctional at this point. The Democrats spent all of their effort trying to push their anointed party insider candidate who needed significant party help to make it out of a primary against a fringe candidate no one was talking about seriously in the lead up to the election and the republicans had such a weak and unappealing array of candidate that a loud-mouthed bozo that was a complete outsider (he'd only changed to a Republican in 2011, but had bounced back and forth between the parties before) practically take over the party.