i believe that Gobekli Tepe was built before the cataclysm.

What you have after, is not a group of people making a warning, it is tiny groups of people trying to survive.

The myths after the cataclysm are such like Quetzalcoatl going around and teaching people how to farm (again).

We are like the 13th "advanced" civilization on this planet.
That archaeologists think that we are the pinnacle in one unbroken chain is ludicrous. Only believable if you bury, hide or ignore the huge amounts of things that should not exist if such a theory were true.