My wife and I walked ourselves out of the JW world one winter back in the mid 1960's. No internet. No anti JW book's that I knew about. No bible reading or study. I found two books .............The True Believer by Eric Hoffer which explained the workings and motivations of organizations and their believers (which served to show me what was behind the curtain) and the Rise and Fall of the Third Reich which proved conclusively, to me, that there was no god, hence the bible was meaningless. I also knew that the Blood transfusion issue was a death trap. Common sense told me it was a really nasty belief with no proof. And Armageddon and the slaughter of innocents was a sham.
Once you rip apart the delusion and replace it with Common Sense you'll never feel intimated again. Objectively once you see something that looks like crap and smells like crap do you have to get down on your knees and taste it to be really really sure? Think about the book of Mormon or Christian Scientists or Scientology. Most of us don't need to taste it to convince ourselves what it is.
The reason most people leave the JW world is because of a serious slight or wrong, being needlessly embarrassed, seeing someone else abused, the banality of the beliefs and teachings, the anti education stance etc. And why are those circumstances so powerful.......... because it triggers our common sense.