Here is the rub, the power center of the Democratic Party absolutely knows who butters their bread, and in reality work in concert with Republicans to advance corporate governance.
Although it is true, the ACA is better than the proposed Trumpcare, the reason there could be a Trumpcare proposal to begin with, is that the corporate Democrats who rule the DNC made damn sure that the ACA was almost entirely written by the Big Insurers and Big Pharma in the Senate offices of Baucus, with the guiding hand of Obama in that process.
Obama promised the Big Insurers and Big Pharma, in private, that there would not be any "public option" in any bill he would sign, thus completely blocking any such move toward a single payer.
Since the Democrats effectively had blocked ANY any proposal for single payer by Kucinich, and in the Senate only allowed a completely insignificant presentation by Sanders, the Democrats are the ones primarily responsible for killing any move toward even a public option, let alone single payer, or Medicare for All.
The "as a Democrat" comment, was asserting a false equivalency that does not exist, and that assertion being that Democrats by party identity with support of such.
Nothing can be further from the truth.