Frankly, if groups practiced it exactly as created by Bill and Dr. Bob, it might work better. They 12 stepped people in one night. No months and months of baby steps, and no sending them back to square one and stripping them of having sponsees for slips/relapses. That's discussed in my Efficacy of 12 Step Programs post.
Your ex is a fuckwit, and so are those that advised him, or let him get away with thinking, Morgan is a trigger. That's very culty. Separate from loved ones. I have no direct experience with NA, but that's below and beyond anything I've heard before.
As far as the Substack migration goes, https://youtu.be/x3c0JgZ59QQ?si=D5KCU-Llvkp-WI4f
Actually, this video is more apt: https://youtube.com/shorts/Pl3__3_b8Eg?si=IoH0NfCCKQ56lLr0