You "suspect" all is lost. Fine. But you're advocating a do-nothing approach. I don't care whether or not it appears that the CO2 situation is lost or not: doing nothing is self-fulfilling and even a cursory study of history shows that "the sky is falling" has been promulgated many times before. Always, human beings have found a way through. You appear to be part of the problem. I'd advocate for being part of a solution.
Aren't you being obstinate? There are many possible avenues of addressing the issue, the Paris accords point out some collective ones. Individual ones are easily understood, if one wishes to actually do something. https://bravenewclimate.com/2008/08/29/top-10-ways-to-reduce-your-co2-emissions-footprint/