Only since you asked, yes I've worked in two of those fields. With a fair degree of success and a large amount of office politics. Which I discovered simply comes with the job. If you don't have a taste for office politics, you can always leave. (I did. Once.) As Joan Crawford used to say, "If you want the girl next door, go next door."
But if you want to be ushered into the corridors of power in a glamour profession, you better have a tough hide and be prepared to work hard. There's always someone right behind you who will be happy to take your job. (Today they are called interns....willing slave labor who want to be admitted to the party.)
You bemoan the fact that "ogres rise to the top" and "people leave the field" because of it. And you wish there was a word for that "cycle of disfunction and abuse." There are two words for it: human nature. The majority of people think that at the end of the day the one with the most toys wins the battle
Now don't waste your time calling me cynical when I'm only being realistic. And enjoy your career as a librarian where I am sure you will find "ethical and humane treatment of employees." (And NO, I am not in favor of employees being mistreated....and I support the unionization of Amazon.)