A really horrendous owner of a small law firm I interned at.
A vile, screaming, profane, narcissistic bully who revelled in being in a position of power over staff and clients (once she had taken their money!). The only one she wasn't awful to was the other solicitor who had worked for her since the start only because she handled most of the case load and the owner knew she would be screwed without her, so she could control herself when she really needed to.
I think she could have really expanded as there was a real demand for her area of the law in the area but it was hard for her to take on more than a certain amount of work due to the constant revolving door of staff walking out or being sacked. She would also suck up to the richest clients.
I think it was due to real narcissism which led to a genuine belief that nobody could be trusted to do the job as well as her.