On the surface this is nothing more than a sloppily delivered hit piece on the destructiveness of humans, and their overwhelming capacity for bringing nothing but tragedy. That alone is reason enough to ignore this anime.
Then you have the main villain, who is essentially your stereotypical individual who retains the memories of their previous lives and see humanity as a scourge upon this earth. They are poorly written and leave no real lasting impression other than that they hate humanity. This is one of the most horrific portrayals of an antagonist ever made.
Then you have the fact that essentially You have 2 protagonists who are in simple terms the yin to the other's yang. One is the "avatar of mother earth" and the other is the "hero who must prevent the end of the world". And as easy as it is to make a decent story-line out of this, they have managed to make it completely unwatchable.
On top of the cliched characters most of the story revolves around basically trying to achieve the same goal across many different parallel worlds. Which in itself is convoluted... At best it's repetitive and at worst its impossible to watch. I would recommend avoiding this anime at all costs...
