[0]: https://www.healthsystemtracker.org/chart-collection/quality...
Also, regarding healthcare system quality, one of related statistics from this article are in favor of US: "30-day mortality for heart attacks and strokes is lower in the U.S. than in comparable countries". Same with ischemic stroke(and it's better in US by quiet much, 4.1 vs 6.1 30-day mortality rate per 100 patients in other countries).
I guess it depends where and what and how but me and my friends experiences are very different from what you say, especially after having had experiences with private healthcare in other countries with colleagues where I was present.
This is typical of how the US does things: other countries don't have a perfect solution, therefore we will stick with our much worse solution.
But what "inadequate care" are you talking about?
Do doctors sometimes not give patients what they demand? Absolutely. But that's the way it's supposed to be - it's hard to make rational decisions when your own health, or that of a loved one, is on the line. That's why doctors consult doctors too.
Before you misunderstand, I am totally in favour of universal healthcare, my country (India) has it. Pretty sure if we can afford it with a population of our size, the wealthy nations sure can.
If you lived in EU you would know you can't really trust public healthcare.
It's the same story everywhere: they introduce it, it works ok for a couple of years, it's a socialist success, yay... then it experiences a very sharp decline, but the government doesn't care
It just seized a good portion of private economy and they're the good guys because they pay your plasters with your tax money, no matter how shitty the service is.
Universal healthcare systems, at the moment, have very bad supply/demand problem, especially in developed countries, where population getting extremely old. And it's unclear how it can be solved.