Because it won't make any difference.

These people don't remember you. They don't know your story. This kid that seems so chosen, does he deserve it? Did the Oracle deserve it, just for existing in a world that once, way back when, turned on you?

And when you're done burning the world to the ground, you're still going to be angry and miserable and hurt. Kind of a thing daemons do, in just about any story, too--feed on pain and negativity and everything awful in the world.

You deserve better than that.