I know this sounds cold, but it comes down to money. Healthcare in America is expensive. The problems appear to be commonly identified by various forms of research and including things like pricing inefficiencies of drugs, malpractice insurance, and administrative inefficiencies.
The problem isn't as simple as blaming medical insurance providers, pricing, or fees. The problems appeared be directly associated to the processes in place, or in the case of drug prices missing pricing regulation. Drug pricing regulation does exist for the VA which has a set pricing schedule, but everybody else gets to pay more.
In order for universal healthcare to come into fruition in the US these cost inefficiencies have to be addressed. If universal healthcare is important for you then these financial and administrative problems are what you should solve for.