Cannot remove/delete family-group.

I am the organizer of my family group. I want to stop this and join another family group. I cannot join the other family because I am in the current one. However, I can also not stop/remove the existing family group. Specifically, in settings, I cannot remove family members and I cannot stop the group (both options are under water). This is the case for both iPhone and Mac.

What options do I have?