Who created god? did god create himself, or did another god create him etc. ad infinitum?
What created the universe? did it create itself, or did another universe create it etc. ad infinitum?
To say that god created the universe, then say that its logically impossible for the universe to be caused by a big bang is contradictory - they use the same arguments, just with different names.
The understanding of God is more essentially flawed than that of the big bang - one is explained with evidence and observation, the other appeals to faith.
Assuming an omnipotent, omniscient, omni-benevolent god is also logically impossible as I understand it:
if all powerful, and omniscient, he knows suffering occurs, has the power to stop it, but doesn't - which isn't benevolent.
perhaps he's benevolent, but doesn't have the power. Perhaps he's benevolent but doesn't know we exist. In all cases a pretty lousy god.
If your bringing up god in a philosophical sense, then you should really justify yourself by destroying the argument from evil:
"If God is omni-benevolent, omniscient and omnipotent, there should be no unnecessary evil in the world. There is unnecessary evil in the world, so there is no omni-benevolent, omniscient, omnipotent god."
What is your understanding of what god is? and why is it anymore relevant than the big bang?