Hello. Sorry that you're going through all that. I wouldn't recommend the way I dealt with it a I became really nasty with them and did a few immature, petty things.
However, the thing I feel I did wrong way back when was concentrating in making my point to them. That's a waste of time. Take care of yourself first (or only). Later I found that the most difficult thing was to forgive myself for allowing so many JW idiots interfere in my life.
Also, please identify the exact root of your anger. It's not the same for everyone. Some feel misled, some feel disappointed, some feel betrayed, some feel abuse, some feel lied to. To me it was more about the way I was treated in the name or their stupid Jehovah, to others is feeling that they were misled to believe something that is not true and had them made important decisions based on their nonsense.
Most importantly, deal with anger in healthy ways, no heavy drinking, no abusing food, drugs, partying. Exercise, have a punching bag in your house, a squeeze ball, etc.
Regardless of what healthy way of dealing with it you choose, make sure that it's a self-loving, self-forgiving and healthy way. Don't take it on something or someone else.