I'll add the ongoing extinction crisis that is picking up steam, itself a knock-on effect of us gobbling up all land resources and also climate change, and pollutants. I remember days in the park in the 1980s where the air would be filled with bees and insects of all kinds. The insects are so few and far between. Like, I don't even see moths swarming around streetlights anymore. It's eerie.
When I was born, my hometown would regularly see around 10ft of snow (I've seen the videos).
During my childhood, that reduced down to around 2->5 ft of snow.
Now, my home town is lucky to see 2->3 inches of snow.
This drought has caused major issues for a town that was built around farming. It's driven them to pull more water from the aquifer which itself has been in pretty rapid decline. Everyone just keeps drilling deeper and deeper pumps (30ft used to be enough, now 100+ft is what people are drilling).
These sorts of slow moving collapses are terrifying to watch. And, at the same time, infuriating to hear the deniers throughout my life claim it's a hoax/not real.
Never say never
The Clathrate gun hypothesis pretty much about this where inside one human generation the temperatures can rise beyond any expactations
https://en.wikipedia.org/wiki/Clathrate_gun_hypothesis
See also https://en.wikipedia.org/wiki/Arctic_methane_emissions
There will never be a point where "Oh shit, everything has exploded!". Instead, it will be every year that deserts will get bigger, it will rain a little less, and a few more extreme weather events happen.
This will happen just a little bit more year by year.
There won't really be a point where you can say "This was the year climate change became really bad!" instead it will take looking at the current state and comparing it to the year 2000 or 1980 or whatever. And by that time, you've got a full generation that does not remember what those years were like.
That's the thing that scares me the most about climate change. It won't be something that will hurt all at once, instead it will just be a steady increase of bad events. And by the time it becomes unworkable, it's too late.