It doesn’t sound like it’s a good fit anyway so being blocked might be a blessing for you. You didn’t share any of the views of anyone in the group so I wouldn’t feel bad. There are ton of forums and chats that are a bad fit. I’d not bother with them.

I was a bit confused why you were upset he called it “my group” if he is the one who formed and ran it. It seems common sense to me. Sounds like you had some issue with him and his wife to begin with. Good luck finding better fitting chats