Most people in the country disagree. And you politicians know this, which is why no politician would ever suggest removing Medicare.
This is the part people don't understand when they promote Medicare for all - it's a really really bad plan, that people don't use unless they have no choice.
This should be the death nail in these proposals, except the people proposing it typically don't even realize the difference.
Medicare for all is a horrible idea.
Government funded private health insurance for all is a good idea.
So to add on to what you've said, yes medicare is nightmarish. Hopefully this offers me a new chance to live a life.