I had a boss exactly like this. She was a sales assistant who got promoted to store manager and she let this go to her head. She thought she was better than us staff who did all the work for her while she sat at the back drinking tea and smoking. Only really saw her when her boss was in so to show she was in control she intimidated us. Stressed me out completely. I coped with it by just ignoring her and staying out of her way as much as possible.