why does nothing bad ever happen to Crisina?
you mean getting pregnant then loosing the baby and a falopian tube, being alongside Mer with the bomb, completly loosing her personality to marry Burke, then being left at the alter, being taken out of the run for solo surgery, the burden of Izzie's cancer on her back, Owen haveing PTSD, even though she wasn't great friends with them - George dieing and Izzie leaving, her job on the edge with Mercy West coming in, Owen getting shot, her almost getting shot, the PTSD she endured, basically being pulled out of the run for Chief Resident, Owen cheating on her, all the fights she had with Mer, and getting in a plane crash. Nothing bad happens to her!?... if something even worse than all that happened she would be dead and then i'm sure you would be happy.
now i'm not sure why she wasn't severly injured in the crash but neither was Mer. their injuries were about equivalent with Cristina's arm and Mer's leg. If she had been injured any more they probably all would have died (she helped mark and derek and arizona and the pilot).
so, no, i don't hate cristina.