I was born into the JW religion and experienced my own mental health decline due to constantly having to deal with the cognitive dissonance. Before I left I really just wanted to die. The 'new system' was not a happy prospect for me to contemplate knowing that many family members, good neighbors, good people were going to be destroyed by my so called 'loving God'. That part of their theology in itself is a recipe for mental health disorders and don't tell me they don't teach the destruction of billions today. We only have to listen to the JW broadcast and governing body members to hear that mass genocide of the human population us still being shoved into the brains of the 'sheep'. ...human hotdogs anybody???
I also observed many depressed individuals from sisters to elders. I've wondered if the mentally unwell are drawn to this religion in fact. They would call them 'the sighing and crying ones..'.
I would call them depressed. These are people who can't cope with life. They are people often living with the consequences of their own bad choices. To hear that 'God will fix it all AND bring back their dead loved ones AND you that they can live forever and pet lions AND panda bears, SIMULTANEOUSLY just appeals to their every desire! Sure, there are also a few educated people that fall for that bait as well but by and large, it is the less educated and depressed.
The rest are born in. My grandmother started our family in the religion straight out of the Great Depression! I think many 3rd and 4th generation witnesses came from that background. And there you have it!