Why atheists think there is no God?

Why atheists think there is no God and death is the end? There is no reason to believe the universe was not created by an intelligent entity, so why atheists believe God doesn’t exist? An atheist and religious person got stranded in the desert and being tired and dehydrated they saw far away a well. The religious person believes water exists in the well and the atheist believes water doesn’t exist in the well. Neither of them know if the well has or has not water. The religious person has hope and the atheist does not have hope. Has the well no water because it can not be proven that it has?. Fortunately you don’t have to believe in God because God is necessary because logically it is impossible the existence of the creation without the creator. Creation or universe is what has a beginning of existence, like for example you, you didn’t exist before you were born. Logically it is impossible the existence of an infinite number of causes, therefore an eternal first uncaused cause that caused what has a beginning of existence must exist. The claim that the Quran was memorized has not been proven. Do you want to know what is reality and what is not? What would mean for the future of atheism if atheists refuse to ask for proof that the Quran was memorized?. The truth is atheism is a logical fallacy that assumes God is the religious idea of the creator of the creation to conclude wrongly no creator exists because a particular idea of God doesn’t exist. The true God is Spinoza’s God. Thank you.