How good is good enough?

Tiny bubble of euphoria was burst today with a bang. Got my assignment back for the visualisation a.k.a. AutoCAD Hell class. After giving the class my heart and soul, [which means giving up all human contact, camping out at the souless Athena cluster and not sleeping for weeks on end] I got a mere 7.3 out of 10, which is possibly a B/C. WTF!!! I thought the prof liked my stuff. Has he no sympathy for people who have never used CAD before and can't use a computer to save their lives?

Am feeling dejected and demoralised. Me, prima-donna-artsy-fartsy-slacker-chick + tip-top hardcore techie school is simply not meant to be. Is a bloody miracle I haven't jumped off the Green building yet.