Welcome, thanks for your experience. Everyone has to weigh the pros and cons and do what they think best, everyone has different circumstances and there are no easy ways out of this organization, as we all know too well.
Just food for thought, as someone who has been totally out for many years, I think I have perspective that someone who is still in could not have.
You and your family may be suffering in ways you don't realize, just because you are so used to it. I slogged along for years, not really believing in it whole heartedly, but thinking it was still a good way of life. It was only after I left that I realized how much it was affecting me in a very negative way, how toxic it all was. You say your children have been shunned through no fault of their own, do you think that didn't hurt them?
While you may feel that, on the whole, this religion is a good deal for you, it is not the same for others. Many have been abused and are suffering due to hidden child sex abuse, abusive marriages, depression, missing out on educational opportunities, etc. The person sitting next to you in the Kingdom Hall may want to leave, but they look at you and think "brother Closed keeps going and he is a nice person, so it must be the right thing to do". I know because I used to be that person, looking at good people like you who managed to keep going and thinking the problem was only with me.
Your being a part of this organization, even if it's to a lesser degree than before, validates it and gives it power and authority. You are helping to maintain the status quo of an organization you know to be corrupt, because it suits you to stay at this time. This is not a criticism, I was in for thirty years myself, but it is was it is.
There are other religions out there that offer guidance and spirituality without the negative baggage of a cult. This religion harshly criticizes other religions, but a lot of what they say is exaggerated or false. I have been to a few that were great. Not all religions believe in a literal hell, some have no doctrine, leaving it to the individual to decide and letting the bible speak for itself, their purpose is spiritual and moral support in a Christian way of life. I found it quite refreshing. They don't tell you what to think, say and do, what a concept! No burdensome requirements, just love and support.
You might consider whether you are staying because there is good in this religion, or because to change now would be very, very hard. I get it, change is scary, the path through is uncertain, and leaving will be horrible, at least for a while. It's monumental, a way of life, and you must be certain it's the right choice. But it is a choice people have made, so it is possible.
Lisa 🌹