The current record for spinning plates is 108. To fix things on this planet of ours would be the equivalent of 1 human trying to keep spinning 10,000+ plates! Most are going to get broken but if he sticks at it, there will be some left to keep on spinning in a fairly manageable, if exhausting, way.
Everyone has a quite valid opinion on what needs to happen to improve our fortunes. It’s unfortunately just not human nature to make such global changes until on the absolute cusp (or a little beyond). That shouldn’t mean you should stop trying. I’m much more conscious of my household recycling (for example) - far more than I used to be when I had the attitude of “recycle wheelie bin is full, I’ll just chuck all the cardboard in the regular waste wheelie bin”.
So, keep on doing your bit when you can but anything more is like trying to hold back the tide. Sad but true. I’d rather not let that get me down. In a majorly perverse way, I’m actually a little disappointed that I won’t get to live to see the days when humanity finally really does sort itself out on this planet and grows up a bit. Would be wonderful to witness us maturing.