This is something that people still do not get it. Americans don't want to get better, they don't see what's wrong with American First thuggery and feck the rest of the world attitude.
M4A, while it's novel at face value, half (or more) of Americans don't want that, even half of democrats don't want that. Obviously M4A is Sander's, but it goes the same with every big policy. Guns? They don't care about people dying, they want their guns. A presidential candidate who champions guns abolitionism and M4A will not win, because that's not what american wanted.
You and us here are debating based on the assumption that Americans are fair, kind, and just minded collective bunch. They are not. As trump have shown us. Half of them are still racist, the other half are too rich and thinks that M4A are a burden, if poor people dies so be it, it's their fault. Half of america agrees and celebrate Trump thuggery, they think his constant bullying as a sign of MAGA and machismo and boy they're so glad that finally someone actually represents them as a country.
Trump will die eventually, or goes to prison, but there will be other trump. Unless the trump voters are gone then there will always be another trump. Better deal with it. This is the Americans we'll have to get used to for the foreseeable future.