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The essence of your post contains well known problems for cosmologists. They have carried out analysis to the first few nanoseconds (maybe picoseconds) after the big bang. In the history of cosmology, problems have become more and more resolved and understood. It was only about 100 years ago that it was discovered that the universe was finite and expanding. In another 100 years, science will surely have answered some of the questions in your post. The nature of science is to continue to push back the borders of understanding, and turn mysteries into theories, and theories into verifications. They have just verified the Higgs Boson. There is hope that newer theories on supersymetry will start explaining how the plethora of possible configurations of the laws of physics resolve into the ones in this universe.