Mr Negative
I know that what you're saying makes sense, but I still can't help thinking that I should have done more.
I feel that I tried everything with my wife. Many of us get the idea that the more you push, the more someone resists. The ultimate thing we can do sometimes is fall on our sword. That won't work for most of our loved ones, but perhaps for a child coming of age and able to question things when we do it. What I mean is, we can be open about our opposition to the cult, stating why it's a dangerous mind-control cult. We can accept that we will be disfellowshipped and lose contact with many family members. That way, the person we are trying to help will see how important these issues are, what we are willing to suffer.
Do ya see how that won't work for most adult loved ones? They shut down their ability to think against the cult rules.
Many of us have been where you are- wondering what we should have/could have done. We do what we can and that is it.