So, our lab professor in university for data structures was evaluating my friend's group assignment next to me and my colleague.

Professor: So, what does this method do?

Friend: I feel it would be best to explain our structure first and then how our methods work.

P: No, no. It's okay, I'm seeing it here in my laptop. *Looking at their report which included nothing about the structure of the assignment since she asked specifically only to place the methods and their complexity analysis due to not having time to look and evaluate a full report for each group*

F: Okay, *proceeds to explain*.

P: Okay, and why is your code commented?

F: Because it's good practice and we learned in subject x last semester.

P: Impossible! I teach that subject and I did not teach that in my classes.

F: Okay, but our professor did.

P: *Says nothing*.

They got a 3.25/5 as a grade for it and got really pissed off. I mean, they spent a lot of time making the assignment's structure perfect, optimizing their code and the professor did not care for the structure, just the methods, on the data structures subject.
FYI, they are workaholic, dedicate a lot of time improving their skills and their normal grades are usually >= 4.25.