>she's right her parents are assholes
>
>they have shown some growth but she wouldn't know it
>
>and yeah i don't blame her for not wanting to be like them


I think that's true to a large extent for most teens as they grow out of childhood and take their parents of their pedestals and realize they are flawed people just like everyone else. Not saying that your interpretation isn't accurate, but I don't think it's unique to Sally's situation at all.

One small detail that I liked about that scene was that Don didn't wave back to Sally like the other parents were when she got on the bus. He coldly turned around and walked away when Sally got on the bus.