This is a point I have been thinking about for a long time.
In the organization, we are not encouraged to have a personal relationship with Jesus - not even a nominal one.
Instead, we are told to draw close to our heavenly father, Jehovah. The Society even published a book entitled "Draw close to Jehovah", encouraging everyone to get to know their Creator.
There is nothing wrong with getting to know God, but when you look at this aspect in context of the Jehovah's Witness faith, it is possible that after learning about the cult, our relationship with Jehovah is ruined. Why?
We are told to pray to Jehovah on a daily basis. Our life is centered around what Jehovah wants. Have a problem? Take the matter in prayer to Jehovah. Wait on Jehovah is the advice often given.
When our eyes are opened, our faith in Jehovah is shattered. We reason that if he was such a close friend and father to us, why would he ever let us be deceived by a cult? Why would he allow us to be blinded for so long?
So, we lose faith in God. We reason that after developing a close relationship with him, how great can that relationship be when we learn that his organization is such a farce?
And not being encouraged to have a close relationship with Jesus, we are effectively on our own.
And that is the reason I think many exJW's lose faith, lose interest in God and feel alone and abandoned.