A person having a difficult time performing all of the duties required by their difficult and demanding job is experiencing role .

The scenario you described refers to a person who is facing challenges in managing the expectations and responsibilities associated with their job. This situation can be linked to the concept of "role conflict" or "role overload."

1. Role Conflict occurs when an individual faces competing demands from different roles they occupy. For instance, a person may struggle to balance their responsibilities as an employee while also fulfilling personal commitments, leading to stress and difficulty in performance.

2. Role Overload specifically refers to a situation where the demands of a role exceed a person's capacity to manage them effectively. In this case, if the job responsibilities are extremely high, leading to feelings of being overwhelmed, the individual is likely experiencing role overload.

Both of these concepts highlight the psychological and emotional challenges that arise when job demands surpass an individual’s ability to cope. Strategies such as time management, seeking support from colleagues, and setting realistic goals can help alleviate some of these pressures.