Republicans talk about "repeal and replace" with the Affordable Care Act but they've had seven years to present a good replacement and all we've heard from them are a few different partial plans which they themselves can't agree on.
So while they're in a hurry to repeal, it's looking like it'll be a long time — maybe never — before we get the "replace" part. And what of those whose lives depend on decent, affordable health care now? Well, if the Paul Ryans of the world cared in the slightest about them, they'd have a solid replacement in place before they even thought of repeal.
Actually, while Obamacare needs some improvements, it's way better than what we had before and way, way better than nothing. Why do many people think otherwise? Because this stuff is hard to explain and folks like Paul Ryan keep lying about it and quoting bogus statistics.