I don't think so that WT does create atheists. It is a matter of personal choice, or most of all a long time research. I have also left WT, then I studied Christianity, then I decided to go through the Hebrew Scriptures, since Christianity comes from another religion, the Hebrew.
When I have done a serious examination of the Hebrew Scriptures (examine history, science of that era) the result was the Old Testament was nothing more than copy of older myths (Sumerian & Egyptian). Many stories never occurred, like the Hebrew captivity in Egypt and their Exodus. There is not a single evidence that 3 million Jews left Egypt during 1450 B.C and spend 40 years hanging around in the desert!!! Also there are many disturbing facts of the Hebrew God, he orders genocides in many cases, did war crimes, and atrocities. There is humiliating attitude towards women, for instance according to the Mosaic Law if she didn't scream loud enough in a rape attack she is guilty and she must stone to death. Or if she shouts loud then the rapper must give to her father 50 sickles of silver and he can get married of her!!!
There is many other staff like that, for instance Cain went to the land of Nod and got married and he builds a city!!! Or Lot's daughters that have sex with their father in order to bring offspring for him!!! Even in the Mosaic Law there is no mention of sex between father and daughter, thus women are considered mans belonging.
I have my points for Christianity as well, especially when I came through the Gnostic Gospels but I consider Jesus teachings universal, since they are based upon the universal law of love.
I like to question everything in order to come to a final result. I'm not an atheist. I believe there is a Creator behind everything, but I do not believe that He/She is behind any organized religion.