Ambiguity in a Box

So, I didn't think it was possible, but apparently there was a box around the vary ambiguous essay we had to write for English 150 this year. Unfortunately for me there was a box and being the brilliant first year student I am, I found it. And then jumped out of it, and kept running.
I was under the impression that the only thing we needed to do was research, and write on something we did in class. Which I did. The only thing was that I also wrote on several pieces of literature we didn't study in class. That seems okay, right? I mean, I'm taking the initiative to work with not just the stuff presented in class, but also work from the last three years of my life.
For my effort in adding in additional works by the same author I got penalized 10% for including work we did not study in class that was not a secondary source.
In my own opinion my essay was pretty good, although maybe a bit on the wordy side. I didn't think that would matter instead I was informed: "your answer was vague and hard to understand." Again I would like to point out that I somehow managed to find the box around a completely ambiguous topic that she described basically as "write whatever you want".
Walls! I have found walls! Limitations to untold creativity and intense potential! She is trying to sabotage me! *Confetti*
Yes, I tore the essay up, all ten pages of it, and threw it out without concerning myself too much about what she thought of my writing. The point for me was that she had written 65% on it as my final grade. Then she crossed that out and put 55% on it instead. So I passed. That's really all that matters because I am NEVER taking English again so long as I don't have to.
Let me take a moment to clarify something. I love ambiguity. I love when things are vaguely worded  and I am given free reign to discover and explore. That's how I came up with the topic. I was flipping through the extravagantly large book of poetry going "what am I going to write about?" when I landed on a collections of Shakespeare's sonnets.
I will write about Shakespeare! I love Shakespeare! I thoroughly enjoyed reading the sonnets, and several of the plays and there is a lot of similarities in both works. So I wrote and wrote and wrote, and a week later, just in time for the due date, I had my essay. It was pretty good. Not my best, but that's what I get for doing it completely last minute.
So, if she doesn't like it, that's fine by me. I put her evaluation where I think it belongs.
In the trash.