Capitalism has a stranglehold on the nation, both major parties etc. Even within the democratic party if elements of what you like start to grow, the party themselves will do what they can to stamp it out. The 70-80+ yr old leadership has no problem telling the actual socialists in the party (very very few) to get fucked when they need to.

Case in point, DSA won most of the offices within the NV Dem party, the national party responded by yanking most of the money out of the state party coffers: https://theintercept.com/2021/03/08/nevada-democratic-party-dsa/ DSA itself then runs with stupid af takes on Ukraine etc that make them unlikely to broaden support further.

Sad part about it all is that centrist dems are still closer to GOP from the 90s than leftists and will still get called "radical communists / socialists". Fox News is (I think still) the most popular news network and shit like Tucker Carlson gets some of the highest ratings in TV. The channel is just a stream of propaganda against anything not part of the GOP. Hell the inspiration for the network started because the founder was pissed at how the media turned on Nixon. It's designed to poison the well and is remarkably good at it. You've got to fight crap like this before even getting a meaningful number of votes to just play a verrrrry delicate game of compromise and incremental adjustments are even going to begin.

Absent global catastrophe I don't think its possible here. However, you can organize and make a difference locally. Community aid and local collective aid / defense are feasible and achievable and more likely to actually help those around you than many other things.