Why Are There Galaxies?

They make space clumpy. They seem to have been created and shaped a long
time ago. They could be a big argument against a "single" big bang.
Stars come out of clouds,and that means these was not one big cloud. If
blackholes are at the core of galaxies they must have developed there
first. Why do astronomers tell us stars are forming in the outer fringe
of the galaxies? What makes that the rule in this spacetime? Seems star
making has slowed down by a million % Never heard of a new galaxy
forming. Well this is another mystery. The forming of galaxies. Bert