“God did it. And He has always existed.”
True, God did it. But if you look at many of the comments you will see phrases like “always existed” that imply time passing. This is not quite right because God created time also. And, in fact, time didn’t start passing until matter and energy existed. So statements that imply anything about time before the universe existed — although it’s hard to avoid — really don’t make sense.
You’re absolutely correct. “We” mark time, because we’re constrained by it. God is outside time as we are capable of understanding it.