An advanced education is part of your life experience. While a grievance may get you temporary satisfaction, it may also dig you a deeper hole. This will not be the only time in your life where you will feel you were under appreciated or mistreated. Sooner or later you will come across a boss, supervisor or other superior who may exhibit the same behavior.
You will NEVER be able to convince him he is wrong. But by talking with him about his expectations you may find a way to succeed in the future. Look forward and not back, the next class is more important. A single low grade will only show as an anomaly if you pass the next one with flying colors.
