A High-Performing Manager Can Still Be Bad for the Business

Some damaging managers survive because their results are easy to count and their costs are spread across everyone else.

They hit a revenue target, deliver a project, or keep output high. At the same time, strong employees transfer away, quieter team members stop contributing, collaboration becomes defensive, and colleagues absorb the work of repeated vacancies. The manager’s performance remains visible. The organizational cost appears later and under different headings.

This is why a manager cannot be evaluated only by what the team produces. Leadership performance also includes how the result was achieved and whether the team remains capable of producing it again.

The issue surfaced bluntly during Joseph Fuller’s Indeed FutureWorks 2026 discussion. Employees often leave poor bosses rather than poor companies, he argued, and leaders need to address supervisors who meet formal targets while corroding the culture, including using severance when necessary.

Short-term output can borrow from the future

A fear-driven team can look productive for a while. People work longer, avoid mistakes, and comply quickly. The manager appears decisive. The hidden effects accumulate more slowly.

Employees stop raising risks because bad news is punished. They choose safe work over useful experimentation. Experienced people leave, taking relationships and context with them. Remaining colleagues carry vacancies and spend time helping replacements learn. Other managers inherit transfers from the team.

None of those costs may be charged back to the person who created them. Turnover sits with HR, delayed innovation with product, and burnout with the employee. The performance dashboard tells an incomplete story.

Culture is created at close range

Employees encounter an organization largely through their immediate manager. Company values, flexibility policies, development promises, and inclusion commitments become real or irrelevant in that relationship.

A thoughtful corporate policy cannot compensate for a supervisor who withholds information, takes credit, humiliates people, applies rules selectively, or treats every request as a loyalty test. Employees learn which behavior the organization truly rewards by seeing what leaders tolerate from a high performer.

That tolerance affects people outside the team too. When a corrosive manager is promoted, others conclude that results excuse the method. When complaints disappear into a process with no visible outcome, employees learn that speaking up creates risk without change.

Difficult management is not always corrosive management

Leaders still need to set high standards, give direct feedback, make unpopular decisions, and address poor performance. Discomfort alone does not indicate harm.

The distinction lies in pattern, fairness, and purpose. A demanding manager can be clear, consistent, respectful, and invested in a person’s growth. A corrosive manager uses uncertainty, favoritism, humiliation, or fear to maintain control. One leaves people better able to perform. The other makes performance dependent on self-protection.

Organizations need evidence before taking serious action. That evidence should come from multiple sources and distinguish an isolated conflict from a recurring pattern. It should also be collected in ways that do not expose employees to retaliation.

So what should leaders measure and do?

Evaluate managers on team outcomes as well as business output. Useful signals include regrettable turnover, internal transfers, absence patterns, employee feedback, promotion equity, quality problems, cross-team collaboration, and whether people developed under the manager go on to succeed.

Look at trends and comparisons rather than one score. A team doing difficult turnaround work may show strain for understandable reasons. A manager whose teams repeatedly lose strong people across several contexts presents a different pattern.

Intervene early. Clear feedback, coaching, expectations, and follow-up can help a manager whose behavior is changeable. State the standard in observable terms: how decisions are communicated, how disagreement is handled, and what conduct must stop. Do not send someone to generic leadership training while leaving employees exposed to the same behavior.

When the pattern continues, protect the team. Moving the manager without addressing the conduct transfers the harm. A severance payment can be cheaper than prolonged turnover, legal risk, and the message that values apply only when performance is convenient.

Employees considering a role can ask how managers are evaluated, what happens when a strong performer damages a team, and whether internal mobility is safe. The specificity of the answer matters.

A manager’s results belong on the scorecard. So do the people, trust, and capability left behind after those results are delivered.