they are widely recognized as better than what the USA currently does and win out on almost every objective metric

The linked document contains a number of objective metrics on which the US does better - waiting times, use of high tech surgical procedures, access to high tech diagnostic equipment, breast and prostate cancer mortality ratios, specialist to patient ratios and patient satisfaction measures. I linked it as evidence to rebut the specific claim that the US is worse on 'almost every objective metric'.

I don't have the time to respond properly to the linked PDF, but skimming it quickly it doesn't seem particularly persuasive.

I'm not asking you to make a detailed rebuttal, I'm just providing evidence of objective measures on which the US does better. I don't have time for a detailed debate either. You seem to assign an extremely high probability to the belief that healthcare in the US could be significantly improved by adopting a European system though and I'm questioning whether the evidence justifies such high confidence.

Ultimately the only reason this is even a political issue is because of the high levels of government involvement. With less government involvement people could spend their healthcare dollars in the way they thought best without having to persuade anyone else. That's another reason I oppose high levels of government involvement.