Not wrong but not nuanced enough. Many Americans also believe in the ideas embodied in the Constitution and bill of rights. Many voted for the candidate who more strongly embodied those values. Just because the vote system is winner take all doesn’t mean that there aren’t Americans who are upset with this outcome.
But actually committing to do something substantially FDRish for the working man isn’t an easy sell within high level Democrat party leadership. I don’t know why this is true exactly but I expect it has to do with money and power.