You only think the way you do because you have no grasp of REAL history and I don't mean the history that is taught in school.
You do not know how long the human race has been on this planet and millions of years is a real possibility.
Civilisations have come and gone for more than the last six thousand years of recorded history and in the same manner, 'God' whoever he might be, is not likely to be the the God of the Bible or any other religious book. These things can only be found out with constant study and research on prehistory and the human development of consciousness.
Then, and only then, when you finally understand where and how the 'Bible' came into being, will you understand that it is simply a piece of manipulative propaganda used by organizations such as religions (Catholicism, Judaism etc) and governments to control a world of lawless people and get the most out of the poorer and less educated than those at the top of the tree.
If something is written simply to control your behaviour then you can begin to understand that maybe, just maybe, not EVERYTHING in this book is actually relevant, important or even true!
But to get to that stage takes years of reading and study! If you haven't started on that road yet, I suggest you begin without delay and finally free your mind from the crapulent corruptions of the past and realise that 'God' is far bigger and better than the slander that is written about him in that old book that people cling to in their desperate and ignorant hours!