From the stories I've heard, things I've witnessed, and my personal experience: I suspect that virtually every new grad who doesn't stay at their residency institution/health system has versions of
@Moonbeams' story.
In academics, I watched one new attending get "let go" because they tried to practice the way they were trained (a completely reasonable way!) but it was different than what my system did, and the newbie didn't course-correct fast enough. I watched additional new attendings leave ~2 years after joining because they were able to basically conform in a timely manner but were never really "accepted" (didn't say the right things to the right people, etc).
I came into my community job
knowing I shouldn't try to rock the boat too hard. However, my department has this utterly bizarre mix of telling me they want to be new and innovative, do whatever it takes to keep the numbers up, get new technology, blah blah - and then fight me tooth and nail on everything, even the new things THEY wanted and I had nothing to do with. There's a lot of backstory that I won't get into on a public forum (nothing is truly anonymous, ever). My "favorite" example is when a new piece of equipment was purchased to be used with a treatment that was commonly done. This purchase was made a year before my arrival, was budgeted to be used a certain way, and was presented to me as something that everyone was excited about.
The first time I used that piece of equipment, you would think I was trying to burn down a nursing home by lighting puppies on fire and making them run through gasoline. I was so confused. I thought it was something THEY wanted because, you know, THEY bought it. I kept trying to use the equipment and consistently met the same resistance. Then, when I said I was going to dial back any attempt to use the equipment, I was told that was also unacceptable, because it was "in the budget" and needed to be used a certain number of times.
In modern Radiation Oncology, if you're junior in any way (meaning new grad, early career, or just in a new place), it's important to remember that you will not be practicing medicine.
The system will be practicing medicine, and you're just there to make sure no one dies directly and obviously from something attached to your name. I don't think there's any other specialty like this, because the therapists, physicists, dosimetry, and admin run a department. Clinicians are outsiders, and this includes nursing.
As demonstrated with the "I lost my job" thread, there's nothing you can really do about it either, unless you're prepared to pack up and move around the country. Even then, who knows how long that option is going to be available.
RadOnc is where dreams go to die. It's incredibly important to just mentally check out and find hobbies and passions not related to your job. With the shift from "direct" to "general" supervision weakening the death grip therapists have on physicians, and RadOnc becoming literally the least desired specialty in modern medicine killing the "I'm just happy to be here, I'll put up with anything" mentality, I'm hopeful things will improve somewhat. It'll just probably take a couple decades.