Should I say something or should I just leave the group?

I’m in a small discussion group at my congregation. The group meets monthly to discuss a theme. Last year I enjoyed it very much but this year one member rattles on and on and I have no patience with her chatter. The leader of the group is a very sweet person but does nothing to moderate her. I am friendly with the leader. Can’t decide if I should talk to the leader or just conveniently miss the rest of this year’s meetings.

We had a different leader last year who was more structured and kept things on track. The meeting was focused and lasted exactly an hour. This year is different.

One issue I have is that a tenet of Unitarianism is respect for the dignity and worth of each person so I don’t know where impatience and criticism fit in.