I don't mean this to be a depressing topic, but it seems unavoidable.
Why do we live or stay alive?
What stops us from committing suicide?
If you believe there is a purpose to life then I can understand your reason for wanting to stay.
But for those that believe life has no purpose, or better yet, that it is something that is filled with continually suffering. Why continue?
If life is like the Greek myth of Sisyphus where he is sentenced to continually push a boulder up a hill only to do so repetitively with no purpose and no end goal, then why do it at all?
What is it that we believe we need to live?
Please accept the comment that answers your question.
Maybe it's not knowing what death entails?
If you cease completely why hurt up the process? Life isn't bad 100% of the time. Death will come one day but why be in a rush for it? Maybe something interesting will happen if you wait?
Maybe you don't cease to exist and by killing yourself something even worse results? Its unknown yet still playable, we don't know.
Everything has a price, why would killing yourself be exempt?
What about the people you would impact? I guess they don't matter either?
I think it's good we don't have a clearly defined purpose. It means we are completely free to decide our own purpose. Why would one need to be dictated to have any significance?
Its true life is full of suffering, so why not find a way to solve it? So no one needs to needlessly suffer?