Depends on which normative ethical theory you subscribe to. It's not a single player game and our own suicides would do nothing to the whole game being played. Are you a utilitarian? If you are, it may be better for you to stay, spread the ideas, battle with pro lifers and fight for universal right to die and a peaceful exit for existing lives, and encourage potential parents to adopt instead of giving birth to prevent more new lives from coming into existence. And when you finally get to ctb, aim at causing the least harm.
I believe the only solution to this mess is total annihilation as well. Whether it can actually be achieved is a different story.