In liberal democracy money is power. The parties are different, but Democrats and Republicans are funded by the similar sources.
Biden is pro union because he said so. /s Stop judging him by his actions. /s He lost reelection because of failing health. /s His appointee, Mrs. Harris, lost the election due to her laugh and not continuing his unpopular policies. /s
Consider USAID as an example of a machine that keeps doing work regardless of the current office holders. Machines to crush children are part of the system. I acknowledge there were some good outcomes from US soft power. However, the child crushing machine continues to crush children even when the people actuating the lever change.
Libya, Syria, Kosovo, Bosnia and various drone campaigns. There are probably others in the last 40 years.
Voting has a relatively low individual cost even if the power from the wealthy remains intact. Americans can slow down the decline of liberal democracy by making political races more expensive. In the end, voting is like throwing a chair in front of Michael Myers. He is still going to stab you, but you can slow him down. Voting against incumbents is a civic duty.
In the meantime, take care of those around you. Create some horizontal power by building community. Maybe get some cardio, growing and preparing food, securing water, outdoor skills and marksmanship.