Yep, cut off my sister about 15 years ago now, as she back-stabbed and betrayed me while I was out of the country, told lies about me and turned 2 cousins against me. She tried to apologise once, and followed up the apology with "But I won't fix the relationship between you and [the 2 cousins]." I knew then that the apology was just lip service and not to expect much from here.There was never any love or even friendship between us, and it was sibling rivalry as bad as you will ever see it.
Recently, one of those cousins tried to 'friend' me online - I ignored her completely.
More recently, I cut off my parents 2 years ago. I have realised that there is a strong tendency towards narcissism in the women on my mother's side of the family. I can see narcissistic behaviours in my maternal grandmother, mother, sister, and the 2 cousins mentioned above. They are truly awful to be around and complete emotional vampires, who deliberately created emotional distress in me to feed off. I am so much better off without them.
On my father's side of the family there is more mental illness, the paternal grandmother being bipolar, which resulted in my father developing schizoid personality disorder. He is like a ghost, drifting in and out of life, doesn't talk to anyone, and doesn't have/develope relationships with people. Not having these people in my life in my life means that it is so much more peaceful, and I can concentrate on my own issues, rather than whatever drama they have thrown at me.