TLDR: Vote anyways, and make your voice heard.
The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, > or to the people. - US Constitution, 10th Amendment
The way that the US is setup, actual power and authority, does not actually exist at the Federal level. Not really. Not over you as an individual. And your individual vote at the Federal level will not really move the needle.
The actual authority and power over your life exists at the State and local levels. And this is where your vote can actually make a real difference as well, because elections at these levels are often decided by mere hundreds of votes. Your local elections are often decided by mere 10's of votes.
The most powerful of all, however, are the local school boards, which are often elected positions. However, decisions made by school boards don't make changes to your community over night, however. It takes years for the children they teach to grow up and begin exerting their control over the system.
What if we vote and the problem continues?
That will happen. I'm sorry that's not the answer you want. It is difficult to make large changes to society or governments in a hurry. You can think of society and governments like large boulders. The larger the society or government, the larger the boulder.
A handful of people might move that boulder slowly over time, more people though, can move that boulder more quickly. And of course, a much faster or larger boulder could always strike it and move it quickly, though not necessarily predicably.
What if voting gives us the illusion of control?
Sticking with the physics frame of reference, as an individual person, you have all the control you could ever want. You just don't have enough power or "force" to make much happen at larger scales. The physics frame of reference breaks down somewhat, though, as a single voice, well spoken and well presented, at the right time, can not only move all the smaller pebbles (people) and the boulder (society or governments), but an entire damned mountain and can move it precisely.
I would suggest medical texts, survival and military field manuals. I don't think they will be needed but it might be best to be prepared. As for culture, stash what you like.
On second thought, the medical texts would be useful either way. https://www.alreporter.com/2024/10/31/analysis-rural-hospitals-closure-crisis-alabamas-healthcare-safety-net-at-risk/ Hospitals closing have been happening for a while.