The bad treatment is a testimony to the falsehood of the claim JWs make that they are True Christians?. Jesus said "By this all will know that you are my disciples if you have love among yourselves." ~ John 13:35.
Just because you want to believe that JWs are the only True Christians?, doesn't make it so. Our collective experiences puts that claim to the test, doesn't it?
Also, you might want to consider Acts 4:19, 20. "[A]s for us, we cannot stop speaking about the things we have seen and heard." We have every right to talk about these things. We are entitled to our feelings about our experiences, whether you like it or not. When you "forget" about the bad stuff or pretend it doesn't exist, you are sending a message to people who have experienced real harm that their suffering is meaningless. Would you dream of asking a Holocaust survivor "Why remember what happened in Auschwitz?" Would you?? That's just how callous and insensitive your question is to people here.