how to leave family accont
will not let me leave to join another family account.
Question marked as
Read this about how to leave a family sharing group --> Leave Family Sharing - Apple Support
If it won't let you leave, are you the Organizer of the family with a child in the group? If yes, you will have to transfer the child to another family or delete their account before it will let you disband your family.
Move a child to another group using Family Sharing - Apple Support