The author's dad was being seen by a variety of highly trained specialists all working to treat him, but "people need to sleep" seems to be a recent discovery in the ICU world, and if his family hadn't been there to help, every new nurse would have tried to give him the same medication that gave him a bad reaction, over and over, just because there wasn't an established place to write that (obviously important) information down.
I've read that food with better nutrition than regular hospital food may reduce mortality rates by as much as half [0]. That's such a huge effect that it's shocking that hospital food is just expected to be bad. Everyone says nutrition is vital for health, but hospitals don't seem to care.
I think the root problem is cost-cutting. Management cuts costs until the brink of disaster, and tries to hold it there for as long as possible. This is not a system that strives for the best outcome for patients within reasonable limits of the resources available; this is a system that attempts to extract as much value as possible from the patients, and patient death is only prevented as a means to that ends.
[0] https://www.sciencedirect.com/science/article/pii/S073510972...