I'm not clear how that relates to the post or what exactly the medical people did wrong from your post? I have a had a few elderly relatives go through long bouts of treatment and they got good diagnoses and care all the way across. The worst was my grandmother's chemo was pharmaceutical and the pills were $2000 a dose and not covered by Medicare at the time.
I have a bunch of other comments in here that relate some of the story. It's honestly too much to give a daily play-by-play of six months of somebody's life.
Suffice it to say I wouldn't accept the service-level we received at a fast food restaurant.
But medical care is wildly variable in the U.S., even just changing a nurse, or going down the street to another facility can magically transform an episode of care from "the dumbest nonsense I've ever experienced" to "reasonable and compassionate".