What are you talking about? Our generation has seen vast improvements world wide. Have some pride (while admitting mistakes were made), and
challenge them to do as well as we have done, and hopefully even better.
Here's some data:
https://ourworldindata.org/health-meta
Look through the measures, set each to "chart" and the timeline from 1955 (middle of the 'boomer' generation'), or your parent's generation if you want, and everything has improved. Life expectancy, Child mortality, Maternal mortality, Burden of disease, Infectious diseases, etc. How is any of that a "mess"?
I have not watched that video, and no doubt some areas have been ravaged by humans, some of us have done things horribly wrong. But don't paint it all in doom and gloom, and all of us are bad people. A lot has been accomplished, we have a lot to celebrate (while also having a lot of work to do to improve).
Here is my "acid test": You think the last generation has screwed things up? Fine, I offer to you a Time Machine. You take yourself and your family back to any time period, you know, before we screwed things up. Some idyllic place, that would be idyllic, except for:
People dying from routine infections, no hip/knee replacement for you, no heart surgery, no pacemaker. no cataract surgery! And, and if you are Black, well, go back to segregation, Jim Crow laws, etc, or maybe even slavery. Ah yes. "the good old times"!
It's not a perfect world, it never will be. We need to work to make things better - that's what I will tell my grand-kids. No apologies, just a realization that you need to keep your eyes open and do the best you can, each and every day.
-ERD50