All the issues mentioned in your post I was not aware of when I faded. That was 1990. Only after access to the internet I got these informations. While "active" (terrible word) I never knew of a pyramid story, the only thing I heard of in the 80's was 1975 but from a brainwashed "whitewashed" Wt perspective.
And the more I read about ever more latest "scandals" I was convinced that the whole "system" has to be changed and not only some minor points, some directives.
In my case a constant feeling of depression and loneliness in different forms as result of the JW lifestyle as single male combined with feeling of senselessness in face of the terrifyging outlook for forthcoming Armagedoon, as well as feeling of senseless efforts in service with parttimejob were the triggers that slowly opened my inner reasons and warnings bells. I stopped to believe in every word, while further playing happiness. I was in the age when a man should establish a family but was desilusioned and unsure, cause I couldnot see how I would ever really like live in JW family pattern situation, teaching children something aweful that I was not really convinced of, I appreciated only the love message of the bible. Sacrificing a child for the blood issue was not in my intention. After I undersigned the "blood card", I hided it and didnt even carry it with me.
When I realized that I could not speak really openely about difficult questions that I had about the blood issue or overexegerated usage of armagedon, i knew that I was trapped. I looked up the "blood" subject in a public library and found out what jewish and catolic thought about, and found the explanation more convincining, fortunately I began to read other things than watchtowers. For me these other books were an "aha-experience". The news since internet are even more convincing.