Suffering from an org doesn't necessarily delete it's validity
You are a victim of the worst kind of brainwashing. Any organization can have good or bad effects. Even groups we find appalling and dangerous have turned people around from "bad" things. All that being said none of this has to do with validity either. What makes jws valid? If you were a Mormon you'd be saying the same thing. Or a branch dividian. Or a nazi. Or a radical Muslim. What makes your beliefs so valid????