Both are to blame.
If you became a witness prior to the internet, you can't be faulted too much. You didn't have easy access to solid information that could expose the origin, false prophecies, and experiences of Jehovah's Witnesses. So if you got duped, well.....lots of people did.
If you became a Jehovah's Witness after the advent of the internet, you are to blamel. You're just plain stupid for not researching it and checking into all aspects of this mind-controlling repressive cult. I would have to say you are ignorant and your motives for joining would have to be something other than wanting to worship God.
The Watchtower Society, imo, is well aware of how to use effectively all psychological techniques at its disposal. Looking back on their complete body of "bull crap", you can see the way they have manipulated words and designed their doctrines toward complete mind control of their followers. It's subtle, but, imo, well-thought out and purposeful. They use "trigger" scriptures over and over that instill fear and guilt. Their art work is designed to do one of two things: Make you feel all warm and fuzzy inside or terrify and instill fear. Go back through their literature and look at the way they use these trigger scriptures combined with their art work and you will see.
I think the WTB&TS is sinister and their main purpose is to make money, invest that money to make more money, and use their brainwashed followers to push their literature and reach deep into their pockets and send more money to these power hungry business savvy higher ups. We don't even know who the real managers of this multi-billion dollar operation are and isn't it strange that their zombie rank and file don't show the least interest in knowing it either.
They are told that if they question ANYTHING, they risk losing Jehovah's holy spirit, not to mention any friends and family that are witnesses. If you question the Great Faithful and Discreet Slave, you are weak and not worthy. They have a trigger scripture to emphasize this belief. They keep them in fear and guilt, and they KNOW exactly what they're doing to these poor wretched slave workers they call brothers and sisters.
If you are a Jehovah's Witness today, with access to all the accurate information available to you, you are foolish. You are at fault.