Simulators are very expensive tools. A good training captain will have his/her candidates leave a simulator session refreshed, better prepared, and having learned something for use in their everyday operation on the line. If he/she can achieve that in a well planned and efficiently executed session then so much the better.
Those individuals, who test their candidates to death, try and catch people out, or program unrealistic and excessive exercises are wasting their time, the candidate’s time, and the company’s time. They neither provide effective training, nor inspire their candidates with confidence and expertise. If these people are on some kind of inflated ego trip then perhaps they should take up management.
Make good use of your simulators, and enjoy the training.