https://www.healthinsurance.org/blog/2016/07/29/health-premiums-after-obamacare-theyre-lower/
To address your question - From the system we had straight to single payer too broad a jump in one move. Single payer does seem to be the answer however.
The only places it has failed badly is where the (GOP led) states refused to set up exchanges or expand medicaid. In areas where medicaid was expanded and exchanges put in place, the program works