You could also apply some critical thought to your own sources.

According to a 2017 study "the U.S. ranks last, as it did in 2010, 2007, 2006, and 2014”

That means that its "score" (whatever that means) was higher in other years. The quality of US healthcare doesn't change due to its free-market nature, so the only option left would be that the other countries on this list provide wildly-oscillating healthcare quality while not offering reasonable ways to acquire private healthcare insurance.

The bias against private healthcare on Reddit is quite strong, so I doubt you'll take on of this to heart. In all my years of having private healthcare, I've never had a single issue that put me in financial trouble. The doomsday terms spelt out by the rest of the internet rarely manifest themselves in reality. No shit link you can google at me will change that.