I left the JW/WT "religion" because of false Doctrine. I was still a believer in god and a believer in the Bible as god's word at the time.
I decided that as ignorance was the reason I had been fooled all those years, I would educate myself.
I examined the claims made for the Bible, for the Quran and other Paths, and for god. This examination was forensic, done with the same meticulous respect for facts and evidence that a Jury of Sceptics who are experts in the various necessary fields of knowledge would use.
The result was I now KNOW for sure that the Bible is entirely the work of men, that the god of the Bible does not exist, and that there is no evidence for, and strong evidence against, the existence of a Supreme Being.
I do not like to label myself, or for people to label me, as too much is presumed from the label, but I am what I am. Not a believer.
I would think my journey is far from unique, some have not travelled as far, and I think the JW religion is good at making people intellectually lazy for sure, hence those people still stuck half way down the road, with lingering doubts over certain things, a lingering JW mindset etc are often a product of the JW habit of having your information spoon-fed to you, and your thoughts shaped by those controlling you.
Journey further down the road if you fit the above, at the end of the road is FREEDOM !