So, the OP goes through the trouble to write a long post without giving more detail and despite saying s/he will post the work, doesn't. If they didn't use it, as they claimed, they would have posted it here. The post and disappearance makes the entire claim seem fishy.
she had to do no research as I sent her all of the sources, citations, and literally everything
In my experience, while customers generally mean it as being helpful, sending all the sources, etc. can do just the opposite. When I am researching, my brain is churning. I know what I'm looking for and I can get to it quickly. When I have a list of things a customer found or compiled, I have to literally sort through them all to see what is relevant for what part of the project, and a gazillion other factors. It's often easier for the customer to give me the instructions and let me to the rest. Sometimes "help" is a hindrance.
Also, bringing in a writer for a part of a larger project where the customer has done work already can present its own set of obstacles. Not knowing more about the project or what the writer was tasked to do, it's hard to say if the OP is correct. More pointedly, without seeing what the OP claims is not worth the price of a Big Mac, is even more suspicious.