Well obviously the best but also least likely answer is a revolution. That doesn't look promising, so I'll focus on smaller and more achievable things.

First thing is not to worry about the national democrats or waste any time or energy supporting them. Go ahead and vote for them if you think it's a harm reduction measure, but don't put in any money, hope, or real effort for them - they've already abandoned you. You still have some say in state politics, so that would be a better place for your efforts. Likewise with municipal politics. In general, you should be more worried about what's going on around you rather than distant national politics that you have no effect on.

Try to build relationships with your neighbours, and your community. Strengthen relationships with your family and extended family. If you could unionize your workplace, that's tangible power that you can wield that's a lot more significant than your vote, and it's another community that you can lean on when the going gets tough.

Develop the kinds of skills that will be useful in a failing country: repairing things, growing food, etc. During the 90s, Russians supplemented their diets by growing vegetables at dachas. They already knew how to repair things since Soviet consumer products usually came half-broken from the factory, but would last forever if you could repair them. Most Americans have yards, so the food situation shouldn't be terrible, but the consumer goods aren't designed for repair. This doesn't discount repairing as a skill, though, it just means you're at a disadvantage compared to 90s Russians when it comes to repairing consumer products.

Finally, remember that you're just one person in a country of 350 million. You didn't cause this, and you can't stop it. Focus on the things you can affect.

Self fulfilling prophecy.