These people are treating you as subhuman. There is no telling what they will say to your daughter about you when you are not there (that you are wicked and will die at Armageddon, is certainly possible). In fact even if he don’t say anything, the message they send by shunning you is disgusting enough. This alone, to my mind, would justify you not allowing them to spend time alone with your daughter, or at all if fact.
People should not pretend this sort of behaviour is in any way normal or acceptable. JWs will inevitably try to put the blame for the situation on the person who is shunned. Well let them try. It makes about as much sense as an overlapping generation. And will impress no one who doesn’t share their zealous devotion to the GB.