My colleagues were great to work with, but my manager had a certain complex about her that even senior staff that has known her for years have yet to figure out. She is amazing at what she does when it comes to getting work done, but when it comes to professionalism in the office, she has a lot to learn - especially as a Manager. There is a big difference between managers and leaders.
There also isn't enough training to get you set up for what you are in for. Facing new challenges is always good, but the expectations that are set just aren't realistic with the resources you have available.