I was about 16 years old when it began to dawn on me that the witnesses were habitually not practising what they preached. I expected more of them because they made such high claims about "having" the truth and receiving guidance from Jehovah's sole channel of communication.
Years later, I read something written by an ex-JW:
"The witnesses spend a lot of time talking about "Christian love" but precious little time practising it." That truly disturbed me because I knew from my own observations that it was true.