Depends if there are negative consequences for dying by suicide. Even if there aren't, I would probably hold on for now- if I knew I would be plunged straight into another life. Things could certainly be worse. My childhood was awful. I don't fancy experiencing childhood again anytime soon in case the next one is too. At least as an adult, I can be a bit more independent.
I don't really believe in reincarnation though- definitely not in terms of it being (enough) of the same person coming back each time. Surely- we'd remember past lives if that were the case. So- if we are born again in some capacity, I feel as if the part of 'us' that gets recycled is so unrelated to what we understand to be 'us' that in effect- we'll just be someone else! How can 'you' even be 'you' with different genetics- different parents, maybe a different location, a different era? All those things make up who we understand ourselves to be so- in those terms, it won't actually matter when I die. If I come back- I won't be 'me' anymore. I'll likely have no memory of the 'me' I am at the moment.
It works in reverse- do you think 'you' as you perceive the world now existed in exactly the same format 100 years ago? 1000 years ago? 2 million years ago, you would have been a caveman. Do you suppose they were that similar to you now? What were we when humans weren't on this planet? Dinosaurs? Or, did we exist on another planet? I just don't really understand how reincarnation could work practically. The human population has also surely been steadily increasing all this time. Where do all the new souls come from?