I think this song describes her finally realizing she deserves more from the person she's singing to than she's getting. She's been pushed around and treated like dirt, and the person acts like she's blowing things out of proportion or that she somehow deserves how he's treating her. She's saying: "Fuck you, buddy. You're not going to have the privilege of my presence anymore. I deserve a -lot- better."
I think this song describes her finally realizing she deserves more from the person she's singing to than she's getting. She's been pushed around and treated like dirt, and the person acts like she's blowing things out of proportion or that she somehow deserves how he's treating her. She's saying: "Fuck you, buddy. You're not going to have the privilege of my presence anymore. I deserve a -lot- better."
Empowering!