This sounds exactly like the church / cult I was raised in (covenant eyes included). It's super insidious since once they isolate you they then hold the threat of excommunication / shunning over you if you don't follow their doctrine. The threat of losing all of your social connections and even stuff like college housing is enough to keep a lot of people trapped even once they want out.

Children, people raised in these groups

these are the only not dumb ones, sorry