Gen. 6:17 "Behold, I, even I am bringing the flood of water upon the earth, to destroy all flesh in which is the breath of life, from under heaven; everything that is on the earth shall perish."
Gen. 7:23 "Thus He blotted out every living thing that was upon the face of the land, from man to animals to creeping things and to birds of the sky, and they were blotted out from the earth; and only Noah was left, together with those that were with him in the ark."
I don't think God is interested in your PR campaign. He seems to want everyone to know that he planned and carried out the destruction of the world.
Touche! And where does the scripture indicate to you that the wiping out did not occur over a period of perhaps decades, with a concentrated flooding of the Middle East via the waters breaking through from the Atlantic Ocean to inundate the entire area (and evidenced with submerged ruins along the Black Sea, for instance)?