It doesn't and I guess I must admit I'm having trouble seeing where you're getting confused with this concept. It honestly feels like you're being deliberately obtuse. It's not the ACA that's the problem, it's the behavior of the Republican legislators regarding the ACA. It could have been any piece of legislation. It's the behavior that's the issue.
> Republicans that sought to repeal it for years and then didn't actually have any real policy ideas to replace it when they took control in 2016, exemplifying their bad-faith approach to politics?
Read that quote. Now read it again. It fully and clearly explains the issue without naming the ACA. That's because the fact that the behavior was bought to light by the ACA is irrelevant. The ACA isn't the problem, the behavior is. "It" in that quote could be any piece of legislation and the behavior would still be troubling. Does that help you see? Do you finally understand?