Some of the lectures in the university is such a waste of time. There should be a course for every lecturer that teaches them how to make the lectures more interesting.

Most of the teachers in my University are postgraduate researchers, and they are forced to do classes to continue researching within the university.
None of them had actual motivation to teach, so the classes were just horrible for me, full of complex terms, inexplicable behaviour of things, and wrong answers.

Luckily for me, I have already finished all that.