I think she is more of an aficionado and she certainly was no bully. In Scientific Method she wanted to kill the little guy that was put in prison but a stream of words was all she managed. If she didn't show herself in the ep. and her powers over the crew, Voyager and everyone all became horribly dead.
Captains depicted in books in history mostly are tyrannical. English captains are tyrannical.
Therefore: Tyranny and captaincy are birds of a feather.