Surely you see that many of our ideas of better or worse are constructions? For the person seeking enlightenment going into refuge and isolation is better. For someone else it might be getting more friends. For another it's faith in God.

Let's say there's an alien species looking at us and considering us detrimental to the planet and potentially our solar system. Let's say they look at our self destruction with joy and a sense of justice. Does that possibility not prove there is no objective bad?