Top of my list has to be hypocrisy.
It runs right through, from elders downwards. The literature and the GB are bad enough, but the bit that touches ordinary people, householders, students and ordinary rank and file is the false goodness that they put on like a raincoat.
Chief among my experiences would be the way they stand by ready to pounce even on those they call their best friends, brothers and sisters. They're vying with each other to earn favour by telling an elder what they saw, who they saw Brother Joe doing it with. And if they wonder if something might be so, they're not above declaring it as fact.
Worse even than that is the hypocrisy of goodness. They stand ready to knife you in the back "out of love". "I tell you this in love." " I say this in peace and with love".
It didn't impress me then and doesn't now when I hear it, which is only in a JW context.
What are the things that you hated most, I wonder?