Here's a redefined example of how God cannot exist outside of time:

Take a clock for example.
It has three hands that run at different rates.
These three hands of the clock are only a partial snapshot of the actual flow of time.

The second hand implies on its side an infinite series of hands that run at faster and faster rates until you end up with the moment hand where the rate of time flow is infinite.

The hour hand of the clock, also, implies, on its side, an infinite series of hands which run at slower and slower rates and have as their limit the eternity hand which does not move at all.

Thus there is no escape from time. And life of God outside time is meaningless.

In fact, time is an essential attribute of God.
No time; no God, but the reverse is not true.
That is to say that there is always time whether there is God or not.

Then there's the ever-famous question:
Can God create a rock that he can’t lift?” If God can’t do this, then he isn’t omnipotent, and if he can, then he still isn’t omnipotent, because then there is something, that he can’t do-–which is lifting the rock.

Some Gods are also supposed to be omniscient (all-knowing), and humans supposedly have a free will. But how can humans have a free will, if a god in advance knows what is going to happen? There can be no choice in any meaningful sense of the word, if there is only one possible outcome to each and every situation (that is the outcome that the god has foreseen). This leads us to conclude that free will combined with omniscience is impossible, and if wee want to keep omniscience and thereby have to kill off free will, what does that do to the concept of sin?

Then there are many contradictions in the Bible itself:

In Exodus there are two very different versions of the Ten Commandments, and God is claiming that they are exactly the same (Exo 20:1-17 vs. Exo 34:1,12-26).

According to Gen 2:18-19 God created man before the animals, but Gen 1:25-26 tells us that it was the other way around.

The Earth is claimed to be flat.

Jesus is said to be born while Herod the Great was alive (Mat 2:1-2), and while Quirinius was governor of Syria (Luk 2:1-7). Unfortunately Quirinius became governor ten years after Herod died.