Start with yourself then. Otherwise you are consciously aware that you are part of the problem.
Until you do that: isn't all life a battle against entropy, and thus suffering is the only way to stave off entropy?
On top of that: animals, plants, bacteria, etc, have no concept that they have the power to end suffering, but we do... and so you're arguing that our unique consciousness gives us the authority to end all life to prevent suffering. But if our awareness allows us this perspective, how can we be sure a higher level of consciousness—whether through our evolution or contact with an advanced alien species—wouldn’t reveal a better solution? Declaring extermination as the ultimate answer could be as shortsighted as a child smashing a tower of blocks simply because it's not fair that someone else made.
