Yet again my girlfriend flunks another math exam. She isn't getting my sympathy this time.
She's done this before?
Yes, I told her to take these exams seriously, but she doesn't listen.
Maybe she thought she was actually prepared this time. I think regardless of the circumstances, you should still support her when she's down.
She did this to herself.
She probably did, but would you want her to disregard your feelings when you're upset? Likely not. Don't do the same to her.