RTG as a DB

To start off I am not that good at the game. However that being said, I created a DB RTG and in the high school games I had a lot of fun and got an interception. I have played as a DB in 25 and as well in former Madden games. Playing as my DB once I got him to college has been a struggle. My player is consistently not being targeted even though I feel as if I am baiting the QB pretty well. But that is not what has been frustrating the most. What has been the most frustrating is the fact that I am constantly being subbed out because my grade gets down to an F. This is so frustrating because the main reason my grade is getting so low is because of the plays on the opposite side of the field that are big gains which is all on my teammates not me yet I have to lose so much coach trust/happiness because of it.