Final answer:
The correct term for someone who didn't do a good job delegating tasks to his staff is a 'micro-manager'. This management style is characterized by excessive control and a lack of trust in the team's ability to complete tasks without close supervision, leading to inefficiency and reduced morale.
Step-by-step explanation:
The nickname for someone who didn't do a good job delegating tasks to his staff is most commonly referred to as a micro-manager. When discussing management styles, the term micro-manager is used to describe a manager who excessively oversees or controls the work of their subordinates instead of delegating tasks effectively. A micro-manager often has difficulty trusting others to complete tasks, preferring instead to keep close tabs on all aspects of a project, which can lead to a decrease in team efficiency and morale. It's important to understand that each management style has distinct traits.
For instance, a slacker would typically neglect responsibilities altogether, a procrastinator delays decision-making or task assignment, and a perfectionist might struggle with delegation due to a fear that the work will not meet their high standards. However, when it comes to failure in delegating tasks effectively, micro-manager is the term that best fits the description.