Agree with all of the above and FWIW I act similarly. It's the "make a difference" bit I picked up on. If everyone in the UK acted like you do, it would still make fuck all difference. The only difference is you get to feel like you are doing your bit.
The other bit of brainwashing is of course this "climate catastrophe" narrative. Will the earth still be inhabited by 11 billion humans in 2121? Of course it will. Will it be a bit warmer? Sure. Certain crops no longer viable in certain regions, but growable in others? Yep. Sea levels a foot or two higher? Probably.
This is climate change. The word "change" however is not emotive enough, so they needed to resort to scare tactics. Can we accommodate gradual changes over the next century or three? Of course we can.
That poor child Thunberg doubtless believed the world was coming to an end and of course if you believed that you'd want to do anything and everything to prevent it. The world is not coming to an end. She was lied to. All our kids are being lied to, daily at school. It's like Pol Pot and the Khmer Rouge burning all books. State-funded, media complicit, end to end, brainwashing, day in, day out.
Is it sensible that we should all try to pollute less and care for our planet? Of course, no-one would deny that. But some of the rhetoric is completely over the top.