A common one is the lack of communication. Patients may not be informed properly about their condition or the treatment plan. This leaves them in the dark and very worried.
One horror story from Grady Hospital could be about long waiting times. Patients might have to wait for hours in the emergency room, in pain and discomfort, without getting immediate attention. It's a nightmare for those in critical condition.
I'm not sure specifically which 'Memorial Hospital True Story' you are referring to. There could be many stories related to different Memorial Hospitals. It could be about a heroic medical rescue, a hospital's history during a certain period, or an individual's experience in that hospital.
Michonne does die in the comics. The circumstances surrounding her death were quite dramatic and had a significant impact on the story's progression. It happened during a major conflict with other characters.