I'd say reliance on nurse practitioners is actually a serious issue leading to much of the rest. Had one that claimed my mother had pinkeye and told her to keep it covered. Lo and behold, it wasn't, and instead was flesh eating bacteria, which covering the eye helped to grow and made things much worse. She lost sight in her eye permanently over that. Fucking doctor's office created new paperwork claiming they never told her that and told her to seek an eye specialist to cover their asses (and its not the first time I've heard about that doctor's office fucking people over because the doc decided he'd rather be off playing golf and letting his unqualified nurse practitioner play doctor). They never told her to see a specialist, it was a nurse where my Mom worked (she was a CNA at the time), that looked and told her to go to an optometrist, who then told her to immediately go to a specialist (as in literally, leave right that moment and drive to the nearest one because he worried she'd lose her eye because of how bad the infection had gotten).
We've also dealt with a string of nurse practitioners down here and they're complete bumbling idiots that when we've come in to discuss lab results instead tried to just run all the lab tests again because...some reason even though they claimed they were looking right at the the medical records, and then another one comes in gives them a funny look and points to them having run the tests just like a week ago but that they don't actually have them or can't discuss them (and wouldn't give us the actual results, which other medical offices told us is straight up illegal). And multiple ones of them have given outright bad information. And when they weren't doing stuff like that they were basically taking a quick glance at the chart, prescribing medicine and then leaving without even telling us what the medicines are or the dose/etc so that we'd know when/how to properly take them. One time they freaked out over something and gave my Mom an EKG claiming they thought she might be having a heart attack right then (there was no physical indication of such, she wasn't having chest pains or any other symptoms of anything), and big surprise it showed absolutely nothing out of the ordinary. I know there's some good nurses out there (I've dealt with some of them), but there's plenty of not good ones as well.