Kinda the opposite, but I took a physics exam once where everyone else did so badly that when the professor curved the exam grades mine went up to 114%. Still not quite sure how I managed that.
I once faced the anger of my entire class because my Inability to pay attention to lessons meant i was the only one that knew how to brute force reverse engineer formulas using the fancy calculator and oblivious to the fact the teacher had forgotten to teach that specific material.
My Imposter syndrome peaked when we got the test and teacher pointed at me directly as proof we had covered the material.
I never really understand what the point of grading on an average is. An individual's ability isn't measured against everyone else's ability is measured against the test. So then to take that and change the grade to something else based on what is essentially arbitrary doesn't seem to have any point except to make it look like more people passed than didn't.
Most professors don't have the time or desire to actually make a good test so the curve is a way to compensate for the poor test. There is more pressure in the current day to also pass more than may deserve it as well.
It wasn't a regular thing in my class; the professor just realized he had screwed up and made the exam way too difficult. I agree that doing it for every exam is a bad idea.