Most of the managers/supervisors are just self centered. They do not listen to anyone. And if they want to get rid of you, they will use the least thing including choice of word you used in a ticket response to a customer such as "big"
You are always micro-managed and you are not allowed to put your System administration skills to a good use. They almost have scripts written for the most simplest task, sometimes it feels like being a Zombie. You don't learn anything. You will noticed when you leave the job you have gain no extra knowledge because you don't get to do any real system administration work ( a script written by someone will do it for you). This way you have no idea how to resolve a problem.
You are always under pressure and under stress to do anything