I'll add another one. They are not there to support you when you need advice or help. I had one manager who did that. I could not discuss any issue i had with him. He told me one day that that was why i held the position I did and he expected me to come up with the solutions on my own. I went in once because I had just had a rough time with another department head. He told me I needed to toughen up. With that the head showed up and started to complain to my manager about something he hadn't done. My manager literally screamed at the guy after 10 seconds. Same person who just told me to toughen up. How these people become heads of anything is still a mystery to me.