It's easy to say "it's hogwash, just leave." And who can argue with that? Not I. But it's a hard, cruel, bitter bargain, a hollow victory, a death of thousands of cuts. It's anguish.
Under-believer
I understand your anguish. When I walked away I lost the love and affection of 43 relative, also the network of friends I had built up among Jehovah’s Witnesses.
I stayed for some years after I had seen through the illusion. In the end I left because I could no longer keep up the pretence. It was not a choice I wanted to make. It is painful and it does not end there.
The world we live in is full of illusions and it is tempting to trade one set of illusions for another. If the illusion we choose to live involves compromise to keep those you love then, it is as good as any. It all depends on whether you can continue to live the way you do and whether leaving would improve your life.
Your happiness is all that matters. Don’t act out of a need to do the right thing, because there is no right thing. Just living your life in the way that works best for you is as good as it gets.