Because he couldn't find the enemy attacking him named "Destiny".
"How shall I strike back, as the emperor?"
A wave of despair filled his mind, and suddenly he burst into laughter, mocking himself: "Hahaha, to think I was so arrogant before! Believing I could one day create gods, become equal to gods—and look now?"
Hahahaha! He laughed bitterly, enormous spiritual power erupted from his mind, making his unruly hair fly about, resembling a madman fallen into despair,
"Divine Blood! Is this the power of the gods!!" he roared.
"That man with a tear mole, with just a trace of blood, was enough for us to see the incredible roots of the world... to see our destiny!!"
In the face of that dignified ancient god, the arrogance brought by his genius was shattered.
"Look, look, this is destiny! This is the will of heaven! This is everything!"