This discussion is really about two separate issues; first government intervention in healthcare and second how healthcare is funded. The US has more political interference than other countries. Working in the US I am often prevented for providing certain care even if the patient is paying cash due to local, state and federal restrictions unheard of elsewhere. At the same time I dispair of incompetent political oversight in Europe as well, but regulation rarely imposes itself between my patient and myself.
Funding is a separate but related topic. The cheapest way to fund health is via national taxation eg income tax, followed by specific national levies followed by insurance policies simply due to the administative costs.
The US has additional issues not least those related to the drug manufacturers but the ACA has undoubtedly reduced healthcare standards. No system is perfect, and most countries are facing increasing costs in relation to GDP. However the US spends over twice what the rest of the developed world spends, the rate of increase is greater, and it is the only developed country where so many of the population are uncovered. Yes you can walk into an ER but you will only get treatment for specific entities. Children still die from asthma in Florida due to not being able to buy inhalers. The US has one of the lowest proportion of HIV sufferers on retrovirals as the cost has been placed on Medicare which is now the financial responsibility of the states. Sadly I see no hope of impending improvement to either HEMS or healthcare in general as the political system is broken. All I would ask is that those Americans who scorn 'socialist medicine' whatever that is reflect when they next pay their property taxes to fund education or argue against privatisation of ATC.