I had a friend fly QF J from DPS to MEL and they had run out of cheese platters. Her seat was broken and her entertainment didn't work. Not good enough for the money paid. After repeated emails she was offered a paltry 5000 points.
I do seem to come across quite a few unhappy passengers on Qantas business as opposed to the other airlines but i guess its also possible its because Qantas is flown a lot more down here and hence more people fly business on it than the other airlines .