How can I suggest my school does grade deflation?

My program is unique in the sense that we have no undergraduate students and so the masters program here weigh GPA differently. Our M.S. coursework is extremely difficult because the department chair ensures professors are purposefully making them hard. For context I spent maybe 20 hours per week studying for class that I barely got a B on. I’ve been typing LaTeX notes to upload on GitHub the type of work we are expected learn so that adcomm members can see the rigour and difficulty. Do you think this is sufficient? I also work at another lab at another school. I showed the professor our course load and he admitted that the amount of content we are expect to just know in a week is “unethical.”

Wouldn’t it be weird if I put somewhere “my school is known for grade deflation so my GPA is not fantastic.” ?