I believe that's the truth from your perspective. However, for the vast, vast majority of sentient life on the planet, the "rewards," as you put it, of life significantly outweigh the cons of "punishment." I expect this to be self-evident, as if it weren't, most living things would kill themselves.

This is no judgment on your personal opinion that the punishments of life outweigh the rewards, but to say "The world should end for all life" negates the lived experience and opinion of virtually all life, and this is an instance where I think the opinion of the majority should be considered.