My girlfriend is studying both math and Computer Science (CS) at the best university in Poland, which is literally the hardest way to get through university. The acceptance policy says that they only accept Olympiad winners and finalists, and even they usually drop one of the majors after a year.
She's very smart and hardworking, so she manages to pass most of the classes, but she still has to retake one subject in September. However, every time this is brought up during a conversation with her family, people start saying that
"Oh, it isn't that bad, I studied that and this and still had plenty of time and good grades."
They can't understand that it's not possible to find time to learn all the math during the year if you have all the programming projects to do. I tried telling her not to be bothered by their remarks, but it's hurting her and she can't do anything about it. They don't seem to see the difference between a hard major, like they might have had, and literally the hardest major in the country. And, mind, it's only people who have long since graduated, as all of our peers understand the situation completely.
How should she tell them that it's really hard, and a much bigger deal than what they think?