In that case wouldn’t it make sense to try to get your friends to use another group chat?
I get people love to use the iMessage groups, but every friend I have on Android create a WhatsApp group, etc. and it’s pretty trivial to use and maintain, especially with close friends.
But this doesn't seem at all relevant to market competition and antitrust laws. It's not much different than disagreements over which coffee shop your friends are going to meet at (maybe you're the only one that lives really far away from the group's most convenient location), or who gets invited to a group of friends' parties.
