Where did the universe come from? Atheistic origin science has no answer.

[snowtracks]

per revelation - one purpose is that the universe provide a theater where God can demonstrate the destruction resulting from sin and evil

To whom will He demonstrate this to? Why is there even a need to do this in the first place?

for spiritual beings: angels, human beings, God wished to show his attributes such as justice, forgiveness, mercy, and self-sacrifice for the benefit of another in a concrete form rather than in abstraction.
another reason God created the universe - to provide human beings with the preparation and training for their position in the new creation. After the 1000 year reign of Christ on earth (old testament promise), this universe will be completely destroyed with fire and will be replaced with one that will be absent sin and evil; and the current physical laws like entropy, (2'nd law of thermodynamics). people will have enjoyable and fulfilling work (no fatigue or drudgery associated with it) in the new creation which won't be under the curse of sin.