Before Hillary Clinton became a Senator, she had beliefs as First Lady that was pro-regular people during a time where the Democratic Party had transformed to a neoliberal-centrist party: socially liberal, but fiscal conservative, in other words, a conservative party that doesn't hate gays and blacks.
Of course, she proposed a single-payer policy during the first year in office and drove the media mad and then mysteriously quiet down then came up with a compromised lesser individual-mandate system that was blasted by ultra-conservative Newt Gringrich as "socialism" but somewhat fully supported Bob Dole's healthcare reform which is another individual-mandate reform.
My main criticism of Bernie Sanders is: Why it took him so long to run for president or switch over to the Democratic Party? Same goes with my "mentor," Ralph Nader. If those two stopped being arrogant and switched over to the Democratic Party in the 1990's or 2000's, they'll immediately become the defacto leaders of the Democratic Party overnight. Though, the only problem is the lesser role of the Internet during those times that is now a great distributor for independent media that benefits Bernie Sanders' campaign as more and more people get their news from YouTube and other sources.
Obamacare wasn't a failure. Just that it's a right-wing healthcare reform that people were initially apathetic about, still is, and were certainly enthusiastic about the public option that was intentionally killed by Democrats and give us Obamacare as a message of "shut up! we got you a healthcare reform! stop bugging us!" that led to us to a political football game of Republicans wanting to dismantle Obamacare while the Democrats wanting to preserve it (conservatism) during Obama years and Trump years as Democrats keep teasing the public with "public option" over and over again. In reality, both parties wanted these type of things to keep going as long as possible until Bernie Sanders started to run for president.