If the earth were indeed flat, with the north pole in the center, and the south "pole" being a circle on the outside of this disk, then would Antartica not be bigger than any continent and circumnavigating Antartica be almost impossible? Don't go claim that all videos of people walking Antartica are fake. Go there and walk yourself.
Ok, let's suppose then the south pole and the north pole is opposite of each other, meaning that the south pole is on the other side of this disk. Then why can you not drill a hole directly from the north pole and the south pole? And what about the sun? Would there be two suns to make the northern "hemisphere" the same heat as the southern "hemisphere"? And if it were like that, what about gravity? As you guys claimed that the earth is accelerating upwards by 9.8 m/s/s, so the water on the southern "hemisphere" should just fall off. So only one side of this flat earth can be used. Then what does the other side contain? And what would you see if you continue to walk south when you arrive Antartica?