Assuming we’re discussing the Abrahamic God, He used to be much smaller in scope; in fact, He was the ancient Jewish War God, back when they had a full polytheistic pantheon. So if we’re going back to the original myths, He didn’t really create humans, nor was He all-powerful or all-seeing, or ‘above-it-all’ in general.
(This is back in the days when Gods were more seen as local clan/town sponsors, like how Athena is the patron God of Athens. He was just a tribal patron god, one they prayed to in order to be safe and successful in war.)
Also, back then Gods in general were written as being much closer to humans, in term of emotions and motivations—again, Greek mythology gives a good showing of this, but you can read a lot of ancient myths and see it in play.
As Jehovah became more and more popular (due to all the wars in the region), He started to absorb many of the myths and abilities of the rest of the pantheon, which is why He seems kind of schizophrenic in the older stories. YHWH was actually the head of the pantheon, and as Jehovah supplanted Him as the ancient proto-Jewish tribes moved towards monotheism, the two Gods ended up essentially being merged with each other.
Still, back then, while Gods were seen as powerful, they were still somewhat seen as limited and fallible. In fact even today there is a strong Jewish tradition of questioning God (albeit politely and a bit indirectly so as not to get turned into salt or whatever).
But, as Judaism grew, and split off into Christianity and Islam, God’s followers began tack on more and more powers and abilities to make Him sound cooler (and increase the power of the Church). So that’s where the ‘all-seeing’ and ‘all-powerful’ Great-God-of-Everything business comes from, really.
TL;DR ‘God wasn’t all-powerful and was ‘written’ to have emotions much closer to humans when those creation myths were first being told.