Leave random family sharing in iCloud
I can’t leave the family sharing because it linked to some random Chinese persons iCloud they probably hacked me
iPhone 14, iOS 16
Question marked as
Apple's instructions indicate that you can remove yourself from a Family Sharing Group (unless you are under 13):
Leave Family Sharing - Apple Support
They also say you have to accept an invitation to join a group:
Add family members to a Family Sharing group on Mac - Apple Support
Add a member to a Family Sharing group on iPhone - Apple Support
Either way, if you are having difficulty leaving a Family Sharing group get in touch with Apple Support.
There is also some important information in the support document If you think your Apple Account has been compromised - Apple Support