That sounds exactly like some of my former students.
Student: "I tried so hard and studied more for this exam than any exam in my life and I still failed. It must be you, the teacher, who is making my learning environment sub optimal, thus the terrible outcome"
Teacher (me): "Really? So sorry you feel that way. I wonder what I did considering the class average for the exam with 80 students was a "B" at 86.5, yet you worked so hard and got a 53.25....an "F". Have you ever considered that working hard is not enough? You have to work smart also. Or maybe you just don't know how to study. Look at this question here that you missed. Go back and listen to the audio for my lectures on this topic. I repeated this specific information about 10 times over three freakin days indicated it was highly important....important for you to know and important enough to be on the exam. And look at this other question that you missed but 95% of the class got right. Go look at my slide for this information. I have it listed in bold with a big freakin red star on it. What do you think that star meant?....that I just like stars?
Here, let me look at your class notes? ........what do you mean you don't have any notes? No, my powerpoint lecture slides are not YOUR notes....they are my lecture outline...they provide me with abbreviated talking points where I also provide fill-in information that you need to take NOTE of. Again, the exam average was 86% and 77 people out of the class passed my exam. Your problem is not ME.....it's you. You need to step it up!"
For those students/former students who failed an exam......this is how your teacher actually felt when you came to complain to them about your exam score. They just didn't tell it to your face......oh, but they were thinking it