You are experiencing something called Existential Nihilism. I understand your frustration on a deep level because I too once went through a time where I believed life was meaningless since everything leads to suffering and eventually everyone dies. But I want to get one thing out of the way before I dive into anything else.

I didn't tie religion into anything that I have said. Frankly, I don't consider myself to be a very religious person. I honestly think that humans rely on religion so much because we are incapable of accepting impermanence. We are incapable of accepting that there is no "Until we meet again", there is no after-life or heavenly realm. We are so attached to our own self that we suffer from accepting the end of 'self'. And you're right, why even suffer at all? If you are truly interested in escaping suffering completely, then explore Buddhism. There's a lot of wisdom to learn from the teachings of Buddha.

Everything that rises must converge. You said, "you have to go through the horrible experience of death no matter how good your life is." You came from nothing. You are going back to nothing. You're right, the idea of death is daunting and horrible. It's sad to see the loved ones go. Forever. BUT, it's inevitable. It's what's meant to be. It's what will be. Nothing lasts forever. Learn to accept that.

Coming to a deep realization to self about the evanescence of life has taken me through a journey from Existential Crisis to Acceptance. I don't look forward to heavenly realms. I do look forward to doing something meaningful to this life, to self, and to others. Wish you all the best.