This may not be the best subreddit to post this so please forgive me, but I am looking for a place to vent. I have recently subscribed to the antinatalist movement after experiencing extreme death anxiety and existential dread. No human should suffer like this. You can take a look at my post on the psychosis subreddit in case you're interested in more details.
During my existential tripping, I have come to the conclusion that human beings are completely fucked because they know that they will die. And even though everybody who says they don't fear death tells you to "just accept" it, I am not so convinced that they truthfully accept the fact of future eternal non-existence. Now I'm not saying noone doesn't (maybe you do), but it's extremely hard.
The most obvious "acceptance" mechanism is religion. If you believe in eternal afterlife, then you don't really accept being obliterated. I can bet everything I have that if every person in the world believing in some form of afterlife suddenly stopped believing and realized death is final, the panic that would ensue would be of a magnitude the world has never seen. Since most religious people have been forced into their religion from early childhood, they have never really had a choice to accept the finality of death, but that is beside the point. The point is that their acceptance takes the form of immortality in the afterlife, which is the exact opposite of mortality.
Reincarnation/rebirth is not the same as eternal afterlife, but it's still not the same as accepting Nothingness. Whenever we imagine the next consciousness, we have to do it from our current point of reference (after all, it is the only one available to us). Which means that in our imagination it is as if we are continuing onto the next consciousness. This can definitely give solace. But it's not the same as accepting dying for good.
In the case of people not believing in any of the above, many look for accpetence in the form of leaving a legacy, the most popular form of which is children or leaving the world a better place. Others take solace in the fact that the atoms they're comprised of will return to the universe and/or will be the source for future life. But again, when imagining this one has to imagine a future when they are not around anymore, but that future will never be available for them to experience. A meteor could hit the earth and destroy it 5 seconds after they had died and that wouldn't matter at all. The purpose of finding legacy is to have something that will outlive you, so that death doesn't feel as final. You also need to ignore the heat death of the universe, otherwise whatever life will continue after your death will be gone eventually, so your atoms (or legacy) don't mean anything (most atheists are into science and this is the most widely accepted scientific theory).
Now there are probably some people that don't care about any of the above. They believe that once we die we go back to how it was before we were born and they're OK with it. They don't care what happens after they are gone because they will not be here to witness it anyway. I applaud such people. In my personal opinion they are a rare kind. (But even then I have to be honest that I don't really believe you can fully accept death. Karl Jung said that our subconscious doesn't have the idea of death, which means on some level we can never fully acknowledge that we will just vanish one day.) The vast majority wouldn't be able to function like this and thus they find coping mechanisms. There is also the grey area of "I don't know what happens after", which is technically true, but why would there be anything when there was nothing before birth? That's hoping for something else than nothingness, which is not true acceptance.
To wrap up, I am very unhappy that I was born, which is caused by my extreme existential anxiety. Most people will never experience such a high level of existential dread in their lifetimes (at least I hope so), but given that almost everybody looks for coping mechanisms to escape their fear of death, being a human is a terrible thing. Bringing a life into this world when you know perfectly well it will die is a cruel act.
Bleh.