I think if you have someone in your group who is openly criticizing you the way she is, you have to confront that behavior. You can do it nicely, in private, and say, the open way you criticize me undermines the group. I am open to suggestions but I would prefer that you bring them to me privately.

You could even go so far as to suggest that maybe your group isn't for her and that she should find a different group that meets her ideals better. I actually got kicked out of a Facebook group (by a friend, no less) because I disagree with the group owner and they were like, this is how it is, if you don't like it, then the group isn't for you. I certainly don't miss being a part of that group because it was super annoying and lots of drama.

I think if someone in your group starts to misbehave, considering it IS your group, that you should privately discuss it with them, and if it continues, tell them they are no longer welcome. These kinds of people need to know they can't abuse people and need to know their our boundaries.

Seesaw