Every healthcare system rations care. In the U.S. that rationing is largely based on quality of employment or how much wealth you have. To some this is a largely immoral way to ration care.

As with all healthcare systems if there is a shortage of workers or it is not properly funded it will deteriorate. The U.S. healthcare system sucks for people who have no real access to it. The wait time of someone with no access to the system is effectively infinity.

Socialism, capitalism, communism, fascism, etc. are merely economic systems and all of them suck if not properly administered.