there are also buddhist movements who think they own the truth. and while religions like bahá'i sound pretty tolerant, when you listen to those who left, you get a different view.
when just leaving the JWs it might look like they are the worst thing since hitler, but after a while, talking to others who left the catholic church in a rural area, the pentecostals or maybe even worse islam, you can put it into some perspective.
not every religion is controlling, but probably most at least try - or tried - to.