It's that if you can afford it that makes it worst healthcare systems in any developed nation in some people's eyes.
Everyone is comparing apples to oranges when it comes to this stuff.
System 1: Everyone has health care but it may be subject to wait-listing which leads to major problems.
System 2: A percentage of the population can't afford basic care but those that can, get exceptional care. Emergency care is typically available to everyone through public hospitals regardless of ability to pay but if you can afford part of it, it has the potential bankrupt you.
The systems reflect cultural bias.
Note: Any system has the potential to become rationed.