I hate writing

I really dislike to write but I have a teacher , not my English teacher, who constantly makes our class write papers and i always think that after i get done doing the paper that it is good. Then i get it back. It seems like the teacher has an extra eye when it comes to grading the classes papers. She told the class that she is disappointed in our paper writing skills and that the average grade for a paper is high to low C's. This teacher can find the smallest things wrong with your paper. Now i understand that will help make me a better writer in the long run but it is getting kind of redundant. I have even let my Aunt, who is a high school english teacher, look at one of my papers before I hand it in and she doesn't even see some of the mistakes that this teacher sees. I think that she will sit there and read each word not the paper each word and tell you are wrong. I just don't get it how someone could be that particular in paper grading.