I'm so sorry about what you are going through.
My parents, too, just don't "get it". I "drifted away" but we have never actually verbalized about my real feelings about the WT. (I'm waiting for that time to come one day, both dreading AND anticipating it...go figure) I think they have just heard snippets here and there from my siblings.
It just gets harder and harder to be around them. Like someone mentioned, I now have "the power of knowledge" and am letting it take me forward, while they are so....MIRED and SET in misery, criticism, distrust, fear, and ignorance. But they remain convinced that THEY are among "the happiest people on earth". I cannot have a decent conversation anymore with them--sometimes I get a vibe that my father resents my conversations now that I can actually speak of new things (not even religious subjects, but things I know he likes and is interested in) that I learn. Evidently "exchanges of ideas" are only permissable between him and another "brother" or "sister".....
There really is no going back. Going "home" is like being on the Moon, alone. I literally don't have a relationship with either of them. I view them now just as many of you who have posted do.