Destroying the world was never the automobile's mission. Like many inventions that have benefited mankind, it has come with unintended consequences, both positive and negative.
I would not discount the negative effects the automobile has had and will continue to have. However, I would argue that the effects of the automobile's existence are so profound and far-reaching, we are incapable of arguing whether the world is, or will be, ultimately a better or worse place as a result of its existence.