This article presents your viewpoint along with quite a few others which mostly point toward Obama’s ineffectiveness and lack of effort toward accomplishing this while having a clear Democrat majority in both houses.
No surprise though as Obama era is not the only failure to move toward single payer … look at what California managed to accomplish with a vast majority of liberal Democrats a couple months ago …
https://m.northcoastjournal.com/NewsBlog/archives/2022/02/01...
Obama’s senate majority was not really a majority. Leiberman was basically yesteryear’s Manchin, and maybe there was a couple others, but either way, having 50 or 51 or 52 Democrats is not a clear path to victory that would make it reasonable to blame the Obama admin for anything.
Best way I can judge their performance/intentions is to note that ACA resulted in more healthcare for more people than any other legislation in recent decades.