As far as a formal support group with a specific process for helping people, I don't know of one. To me places like this, some Facebook groups, discussing sites about the various ex-jw media that's out there (youtube, podcasts, blogs, etc.), give people a place to find support. There are meetup groups in some cities where people go to the meetup website and then arrange to attend a group meeting. If a person needs serious help they should probably be in therapy of some kind. There are plenty of support groups for all of the issues mentioned, and they don't have to be specific to former JWs. There could be a former JW support group, but I'm not sure how it would be able to address all of the issues in the same group. I think there are usually specific groups for specific things in the world in general. Simply being an ex-JW may not be enough, you might have to have ones for each specific issue.
Just my 2 cents.