I spent the first 18 years of life dealing with emotional, physical, and mental abuse by both parents. End result, I'm a massive multiple.
A few of my alters emerged as abuser alters taking after my abusers. They hounded me and condemned me long after leaving my loving abusers. Even today when something goes belly up, they get vocal and ride me until I realize what they are doing. They don't quit till I tell them to STFU.
When the abusers hate you, you begin to hate yourself. Soon, you are your worst enemy.
After I got past the C-PTSD (years of inebriation) I've begun to start loving myself. Of course we're fractured, but we've grown into a confident system with a few hang ups.