Well said Shadow.
I'd add that he should have threatened legal action rather than making trouble. In addition he should have included the watchtowers own documentation on there rebuttal from there arc.
They should have never admitted anything as well they followed the JW rules and that screws then over. Hostility never works when your dealing with a cult member, they get defensive. I viewed this whole experience as what not too do if you want to maintain family relationships.
Many other ways to handle this.