My problem with the Big Bang is this: If all the matter in our universe were brought into a very small volume of space, then it would collapse in on itself and form the black hole of all black holes. Nothing can escape from a black hole, especially one so big as to contain everything. Therefore, there could not have been a Big Bang.
Well, there are black holes in the centers of galaxies including our own Now then, we know that matter can fall
Into black holes. But perhaps, by some mechanism yet to be elaborated, black holes are / were also sources of matter? ??