There is lot of choices individuals could make. Forgo EVs, only walk or bike. Instead of living in large spaces, move to something much smaller like capsules. Forgo electronics and internet in general.

More chance to build better habits with next generation than trying to convience gran’pa doing differently…

In France we (edu and ecology ministers iirc) tried to have only vegetarian meal one day per week in public schools. Agriculture ministers got very angry as well as a bunch of noisy parents. Legislator choose to abandon the project.

At least some of that inaction is due to the billions of dollars spent encouraging it. For example, ICE SUVs are common because they’re subsidized by the government. If there wasn’t a huge mass of climate denial funding it into a political litmus test, removing those subsidies would mean that the median vehicle on the road burns half as much gas.