Why Do Managers Become Aggressive?

Edited from the author’s March 2025 article. This is a discussion of workplace behaviour and organisational conditions, not a diagnosis of a manager’s personality or mental health.

Look beyond the label of a “tough manager”

Repeated humiliation, unfair criticism, intimidation or deliberate exclusion can make people reluctant to speak. Calling this a demanding leadership style can hide the effect on everyday work and relationships.

The source groups possible influences into learned behaviour, threats to a manager’s sense of competence and depleted capacity for self-regulation. These are perspectives for investigation, not explanations that excuse harmful conduct.

What behaviour does the organisation reward?

Managers learn from what more senior leaders do and tolerate. If public pressure produces visible results and has no consequences, it may become part of the organisation’s normal management repertoire.

Ask what gets recognised: only hitting the target, or also how the target is reached? Check whether people can report a concern without exposing themselves to further pressure.

When does disagreement become a personal threat?

A missed target, a difficult question or an independent specialist can be interpreted as a challenge to authority. The useful question is not “what kind of person is this manager?” but “what happens in those moments, and what alternatives are available?”

Clear roles, workable expectations and constructive feedback provide a different way to respond. An employee’s mistake or disagreement does not justify aggression.

Pressure is a context, not an excuse

Workload, conflicting demands and fatigue can make a constructive response harder. Addressing those conditions matters, alongside clear responsibility for behaviour. Support without accountability can leave the team exposed; accountability without support may fail to change the conditions.

Turn observation into action

• Describe specific incidents and their effect on work, rather than assigning a personality label.
• Make expected leadership behaviours explicit, including how concerns are raised and handled.
• Give managers practical alternatives: constructive feedback, clear agreements and ways to ask for support.
• Review whether consequences are consistent across seniority levels.
• Use an appropriate confidential route for serious concerns; do not require a public confrontation as the first step.

Trust grows when the organisation’s actual response to harmful behaviour matches its stated values. A workshop alone cannot substitute for that response.