Well I did feel extremely guilty for many years until I did the research on the internet and realized I had been duped and it was all BS. I didn't leave due to doctrine, I left because I couldn't take the isolating lifestyle of being cut off from other people-- since I am suffering from bipolar depression, it was SO overwhelming to be constantly told that everything was evil and bad and I could never enjoy anything.
When I turned 21, I had been missing more and more meetings and was just not caring anymore (after years of literally never missing a meeting and never missing turning in field service reports). I wanted to live a normal life, get married, have kids etc.
Thank god for the internet! I really had my eyes opened. I do miss having a relationship with my JW sister, but she is so mentally ill that it's better off that we don't speak.