“I don’t like the way you keep treating me. How can I change?”

You read that right. No, there aren’t any typos in this dialogue, because this isn’t a dialogue.
There is nothing missing from this two-sentence sequence.
That is exactly the point: this short and empowering quotation must be a monologue.

Every day we witness many of these classic frustrating scenarios, wherein, regardless of who is involved, the lines seem rehearsed and everyone is off-book.

A perfect example (Warning: Barnum-ish Effect ahead), your parents.
The recurrent and totally unproductive interactions in the perennial disputes between your mother and father – 30+ years later, zero creativity, reproaches are exactly the same... laziest scriptwriters ever (replace “mother and father” by the actors of any long-term relationship).

Here’s a bone to chew on: you surely have one relationship (personal or professional) in which you are not only not satisfied, but you...