CW
spoiler
If you're at the point considering that, I hope you have access to a therapist or an IRL support network. Being trans can be a nightmare, but I'm sure there are people who love and care about you if you were gone. And we'd miss your posts here as well. But I do understand and relate, and occasionally have those thoughts too. I really hope you hold on.
If reincarnation is real, one of the beliefs around it is that the next form you take depends on your positive or negative actions here in this world, which could be any gender or any living creature from human to mouse to single-celled organism. If I wanted the best chance possible to reincarnate into a cis woman, I'd dedicate my life to living authentically as a woman in this life, and try my best to add brightness, empathy, and happiness to the people around me, and fight hard to find joy, even when sometimes I know it can be hard to even get out of bed in the morning.
Just something to think about. We're here for you, to the extent that we can be on an internet forum, and many of us share your struggle. <3