Thinking we can stave off environmental disaster by composting and cycling is like trying to beat stage 3 cancer by drinking 20 pounds of fruit and vegetable juice a day.
I have every sympathy with you, OP. I run one car for the whole family, recycle, compost, avoid plastics, nurture an insect friendly garden, cut hedgehog holes from my fences, only fly once every few years, etc. I just don't think any of these things will make any difference.
People cannot see the effects of this in their every day life, and will not in this country for some time. We are in one of the rare parts of the world where global warming is likely to increase crop production for some years to come. By the time the UK sees a large impact from this, every tipping point will have been passed.
I don't blame these ordinary people. I blame the billionaires, the oil moguls, big pharma, weapons manufacturers and dealers, the people who know the true facts and projections and spend their money obfuscating this for the sake of profit.
I think the world had a fork in its path, Bush or Gore, and we took the wrong path. I am not sure we have the time or the ability to recover from that mistake. Every glorious, record breaking summer day is bittersweet now. I can understand your frustration, but I can also understand the urge to simply enjoy what we have, whilst we have it.