Accepting feedback is a skill, and a manager has to deal with vastly different skill levels in the people they provide feedback to.
The manager's manager also has to be supportive. I had a manager once who, when one of my directs complained that I was "mean", told the direct that I shouldn't have been so direct. This undermined my ability to give direct feedback, and deprived my employee of the opportunity to practice the skill.
The manager's manager also has to be supportive. I had a manager once who, when one of my directs complained that I was "mean", told the direct that I shouldn't have been so direct. This undermined my ability to give direct feedback, and deprived my employee of the opportunity to practice the skill.