As a "born- in " I had to constantly grapple with "Cognitive Dissonance" and not being able to swallow all the nonsense they came out with, such as a great prophecy in Daniel being fulfilled by Rutherford and cronies lurking amongst the trees at Cedar Point Ohio in the 1920's, what utter tripe.
But my first "Aha !" moment was whilst reading Daniel chapter4, it struck me that the fulfillment was right there in the chapter, at the end, and that 2520 years was simply not there, or anywhere else in the Bible !
I actually hung on for a few months after this, an Elder promised to return and build my faith in 1914, of course he never came back.
The actual final straw was when the GB/FDS demanded loyalty and worship that rightly belonged to Jesus just one too many times.
I walked out of the K.H, turned and looked back at it, and thought, "I am never going there again"
I was 58 years old, and finally had begun to think like a rational human being.