and if you lived 100 years ago you never would have known they existed because the internet hadn't been invented yet. there are many horrible things, sure, and there are many wonderful things, and there are many in-between things. you said above that you care about the holocene extinction more than your own life, but focusing on it is drowning you in misery and preventing you from doing something meaningful. staying inside and on the internet keeps you in a cycle of feeling shit. use how much you care about this to get out there - build connections with others that care, do something with your life that pushes your corner of the world in the direction that you want, and try to do as much enjoyable shit as you can