“This thread wasn’t supposed to be about Gemtrias! can we please stay focused everyone?”
focused on what your OP included 3 debatable points ( 1) We know that the Jewish people had to be in Egyptian slavery under the rule of the pharaoh for 430 years. 2) It is known that our world must exist for 6000 years. This is the deadline for the coming of Moshiach and the onset of Liberation. 3) the last day of 5780 will come on September 18, 2020!)
and combined them to some nonsense
This is not much different than people using gemtaria for all sorts of nonsense (There are gmatrios showing both donald Trump and Barack Obama are moshiach)