I've never been a big fan of classes being taught by TAs but I do acknowledge the need for them...lack of professors willing to teach the subject, or just simply low funds on part by the school. I will say that I wouldn't retake the class, alot of us had TAs for English 101 and 102 (I APed out of 101 but had the worst TA for 102) and are in your shoes...ie. got stuck with a grade we felt we didn't deserve. The important thing to do is to move on, and if you are asked about the grade, I wouldn't make a big deal about how you were graded unfairly (trust me I'm sure u were...some TAs really have it in for us). I think that wouldn't look the best to an interviewer, I'd just mention how you were young and still a freshman...that alone should excuse you, if of course you improved later on.