Competency is contextual

The manager who competently spends all her time treating an employee like a bonsai -- clipping his initiative, his responsibilities, his thoughts, and his contributions whenever she notices something growing -- that manager is able to destroy a business. She's not a capable manager in the usual sense of the words, but she exhibits a systematic ability. On the other hand, the managers who know about her bonsai work, and let her continue with it, are incompetent spectators -- unless they do more than cheering. For instance, they could delight in possibly screaming or, better yet, giving conflicting, illiterate instructions.

Achieving competency in persistent evil behavior takes a lot of dedication.