It's no use caring so much. After college, who cares about getting high or low marks, as long as they can pass? Besides, you can't afford what you want. Expose him? Whistle to the teacher? Is it useful? Don't be so naive, just be yourself. By the way, it's good to be self-motivated, but don't always strive for the first place. This is harmful. What I give you advice is only your own personal experience. I hope you can understand. Finally, happiness is more important than anything else. Such a trivial matter is really not worth worrying about.