"you dont have ANY proof whatsoever that he exists." That is empirically not the case.
There are 40+ fundamental constants and quantities of the universe. The chance that every single one of them would have values that allow for the existence of physical life, solely by chance, is 1 in 10 to the 1240th power. By comparison, taking a 52-card deck, shuffling each time, and getting the same exact order of all 52 cards solely by chance is 480 QUADRILLION times more likely. There could be ten thousand universes and the odds won't look any good. In fact, the odds still won't look any good (less than one in googol squared) even if there were ten to the thousand universes. The universe almost certainly did not obtain the right numbers by chance. However, it still attained the right numbers.