Why Is It so Difficult to Save the World?

I am a handsome young hero. My dream is to travel to the end of the world with my sword and save the world with one hand. However, why is it so difficult to save the world? ! ! This is Nebula Continent; There is an endless abyss here; There are six realms of reincarnation here; Here is the Temple of Light; This is the place for all righteousness in the world, and evil will never last forever. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.