We're not going to all die in half a century.
We haven't even reached the tipping point yet so if you want to believe humans can still be saved, that is still technically a possibility - at least short term.
Ultimately humanity will go extinct one day, there's no way around that. If you want to believe the worst news (I'm not saying you shouldn't) then sure, it looks like humanity is in its way out sooner than later. But it's not within your lifetime, not even your kids if you have one, This is a slow burn, it's gonna take hundreds of years at least.
And ultimately there's nothing you can do about it. Even if you go vegan and stop driving, it's not going to change billionaire superyachts and private planes. It's not going to stop Nestle ruining our rainforests. Or BP destroying our coasts with oil spills. It's not going to stop our politicians being unable to enact policies to save ourselves.
The extinction of humanity is not in your lifetime and not your fault. Stop worrying and go watch TV