There are mountains of academic research showing that even in “democracies”, public opinion rarely translates into policy (by design).
The problem with that argument is that there really is no such thing as public opinion at scale. You can poll people/the general public on just about any issue and the answers are going to differ massively depending on framing effects. In the end, it's hardly better than just flipping a coin.
https://www.nber.org/papers/w29766
Stop re-electing people.
Stop sitting at home projecting apathy and ennui in between WOW raids and rounds of LoL.
Mountains of evidence from history shows public has to stand up for itself, not lick boot.
Refuse to give the politicians and owner class assurances they too refuse to provide.
Most of them are old af and have no survival skills. They're reliant on the latest social memes, stock valuations not religious allegory, that are not immutable constants of physics.
Boomers looted the pension system of the prior generation to fund Wall Street. Take their money. It's American tradition.
Remind them physics is ageist and neither physics and American society afford no assurances anyone has food and healthcare.
Not much of a democracy...
Even accepting your premise your options are still either:
1) Don't participate (and accept the consequences)
2) Participate (and accept potential disappointment/failure, with the benefit of having tried)
If you view 2) as fruitless unless your desired outcome is likely, you miss the potential value in the pursuit itself: working with like-minded people, building community, developing new skills, taking agency in your own life, and whatever else might come up along the way.
I don't begrudge anyone for choosing 1) (as long as they own their decision and don't force it on others), but 2) still seems like the aspirational choice I'd want to make if I could.