Well ... I'm a personal assistant to a millionaire, basically. I have him and two other slightly more junior people, but the other two understand that they are being allowed to share his assistant, if that makes sense. I sit outside his door. I will work for him until he retires or dies, and if he left, I would go with him. So it's not so much like I have a boss, more like I have a king. We're part of a firm and there is a director level admin person who does some paperwork about it, but my evaluation is a formality. There is no team.
I don't need supervision and hopefully I only need detailed instructions once, but I do need them that first time. I need to know down to the minutest detail exactly how he wants things. Then he gets them just like that every time. And absolutely nobody comes between. If/when anybody does try to come between, all I have to say is "He said he wants it like this," and that's the end of it.
It's a very different world than what you're talking about. And that's by my choice. I can't work in that mess.