I don't think you are reading what she wrote. SHE did not call him that or refer to him like that. HE is the one who classified himself that way. HUGE difference.
My parents never called me a snot, or a terrible big sister, or the black sheep of the family. But in looking back, seeing who I was and who I've now become, I can freely and honestly admit I was all those things. So what? I was, I changed, I grew up. It says nothing about how my parents treated me.