I shop for about 40 companies. I think maybe six send me feedback after each job. i save them in a folder. I can't even tell you who they are without looking in the folder because i really don't care. I only save them in case I ever feel like a loser someday, I can read all those glowing reviews and know someone loves me... ha ha.
This is largely a "no news is good news" sort of thing. If you got paid, you did okay. Don't worry about the grades and don't expect a lot of feedback.
Time to build a bigger bridge.