It's interesting that you have listed some things that I was thinking about recently.
The usual claim by the witnesses is that everything they believe is Bible-based. I used to think that it was so, and told people that it was so.
Then you start thinking, where in the Bible are month end field service reports? Where does it say that your church is called a Kingdom Hall? Where does it say that you shouldn't take the memorial emblems? And once you start pulling on that little thread then the whole garment starts to unravel...
The sad fact is that the GB know it otherwise they would have called their book What The Bible Teaches, and not inserted the word Really into the title. Because it implies that JWs have been shown a secret Bible hidden away from the rest of the world. And everyone gets curious about secrets and want to know more. And then they get caught up with the organisation.
I have always, even when I was an elder in the sad old days, had a personal library of books by other religious groups and organisations. Everything from Thomas Merton to the Dalai Lama. My mind is always open to fresh ideas. And as I had to attend the funerals of my staff on behalf of the management team I got to go to many different churches and hear the services. Whereas the average JW wouldn't go into a church even if it was a fine architectural building. Guess it all contributed to my waking up.