The biggest thing for me was reading in an old Watchtower that the GB didn't claim to be inspired, I always thought they were because of being "spirit-directed"
So that got me thinking, if they're not inspired, how come I'm supposed to follow them as if they were??
Praying about this dilemma led me to read Luke 21 v 8 which hit me like a bullet between the eyes
"Look out that you are not misled, for many will come on the basis of my name saying I am he, and, "the due time has approached". DO NOT GO AFTER THEM".