So, you propose that I live in a state of perpetual nausea from eating nothing but horrid-tasting, questionably-nutritious, plant-based “food” instead of actual food, and then die in the apocalypse anyway? No thanks. Civilization is done for, living in it is miserable enough already, and I am not interested in sacrificing what few shreds of happiness remain in order to accomplish basically nothing.

The only way to avert the coming disaster is decisive, mandatory action from the top of society on down, and that obviously isn't going to happen, so the best I can realistically hope for is to live it up and be dead before it gets really ugly.

But I still do what I asked of others: I reduce my footprint

Not as much as you could. You still live in shelter, use electricity, exhale carbon, eat carbon-absorbing plants, and excrete methane. Humanity's very existence is driving global warming. There is no escape.

support workers’ rights

running for office

working towards things like ending harmful subsidies

None of these things are going to happen. The rich will string you up by the toenails before they let you derail their gravy train, and your fellow proles will cheer as they do it. That's why we're doomed: powerful people are enforcing our doom, and everyone else worships them.