@[email protected] (UK perspective) I think there's a couple of things in play there. In the short term, the NHS is going through a historically rough patch at the moment and has been for a while, so that tends to get more focus internally than comparing it to external systems.
The other is that most Brits don't really have a good handle on how the US system works - you can find some videos of people asking Brits on the street about, for example, the cost of giving birth in the US and they have no idea.
@[email protected] The first time I worked remotely for a US company and had a conversation with my colleagues about why all the job ads focused on health insurance so much was quite a eye opener...