There is proof that god doesn't exist, your common sense is the proof. If you think logically for a little bit, you can see how all religious books are exaggerated too much, so much that most of what they say or wrote isn't true, just some part of it, which is the less exaggerated or non exaggerated parts with no supernatural things on it. Doesn't take much to understand why all supernatural believes are made up, you don't need a genius or a scientist to tell you why, by yourself with your common sense alone, its enough to dismiss any existence of any kind of supernatural belief.