You are weak if you do not stand up to your values, if you tolerate someone abusing you, if you do not have perseverance to endure under difficult circumstances, if you cannot face up to adversity, if you are not honest, if you do not have self control, ...
By going to your teachers to obtain some answers regarding your grading, you are on the contrary demonstrating that you are strong, that you will stand up to your rights, that you demand answers to unfair grading. It keeps the teachers on their toes and they will know that you have zero tolerance for unfair grading.
Continue to demonstrate your strenght of character young man.