Revisions?

I'm not sure I understand this writing intensive course thing. I mean, I understand the point. I'm supposed to get better at writing through writing lots and getting feedback.

But what I don't get is when I write a draft for a paper, tear out my hair in frustration writing it, resign myself to it being the crappiest piece of shit I've ever written and hand it in in shame only to have it returned to me with nary a mark but an A.

What am I supposed to do with that? How does this help me? I refuse to believe that there is nothing that could have been improved. Something can always be improved.

I realize that I tend to hold myself to different standards than others but it is by no means the best paper I've ever written. I don't really see how these writing intensive classes help me if that's the best feedback they can give me.

All they're really saying is that I'm perfect and it's all downhill from here, which is crap. I need challenge.