I hate it when students whine about the unfairness of their lousy grades and how they really deserved a higher one. It's even worse when the Treasury Department does it.
I was pretty pissed that I ended up getting an F instead of a C or D even. If you think an A to a B doesn't matter, change ALL your A's to B's and see how you like it being "fair". As for the credit downgrade, maybe it was right maybe it wasn't. Still trying to decide for myself.
P.S. That damn physics teacher is still teaching (aka sipping her Diet Pepsi in her chair all day) at my school.