I woke myself up. It wasn't doctrine or teachings that got me to question them but their arrogant self worship elevating the Watchtower to God's position. Something just didn't feel right. It was affecting me to the point where I was having anxiety attacks out in field service.
I also had a strong curiosity as to the older literature and was beginning to build a collection. Money kept me from purchasing the original bound volumes from the 1870s to 1916. If I would have had a bigger collection it probably would have gotten me out much sooner than I had.
I also read some apostate books by Christian Fundamentalists on doctrinal matters but that did not convince me. So I was not necessarily vulnerable to the ranting and raving crowds. And I was exposed to them and even accepted some of their literature on the day of my baptism.
In the long run it was my sense of integrity and rational intuition that got me out.