The Angry Co-Worker

The Angry Co-Worker
There always seems to be that one person in every job that I have ever had. The Angry Co-Worker. You know the one that I'm talking about. The person who absolutely hates their job. I mean hates their job. I just could never figure out if they really hated their job or just hated their lives and the job was the only place where they could vent their frustration.
I always wondered about that person. I wondered about their background. Was it their background or work history that made them so angry with everybody? I wondered about the events leading up to their hostile attitude. The funny thing is that I didn't always remember that person being so angry when we first started working together.