I'm inclined to agree with your t. I also think they all have a purpose. For me and my system it all comes down to a few things though... are their good qualities just buried under nasty ones as a defense mechanism, is what used to work to keep us safe now dysfunctional/damaging, or maybe is it some kind of programming set in place by an abuser (like a persecutor alter instead of a protector type) right? We had one who used to do that and she was/is a self hating type but she's aggressive so it's never a sad hate but a violent one. She has long since learned to better channel that anger towards productive ends though. She's really helpful and on top of her stuff now. Was not always that way though...