What is this post even? One of the main plot points of one of the books was about how the students are so engaged that they made an underground secret class to study and learn.

Harry literally stays up all night studying his books during summer break in the earlier years, the book describes how it’s all he can think about. (before schooling became a lower priority due to the active war).

There are always going to be boring classes, and the book describes that even Hermione is bored in some of them, but typically the students are always engaged, it’s clear that Hermione is a hard worker with doctor parents that expect a lot from her, not that she is some hyper genius.

Harry is a rich jock and a literal child, he is the common trope of the school athlete that slacks in classes occasionally and likes trouble making.

I think it’s very clear that the students were generally engaged in engaging classes with good teachers (hagrids classes, PE / flying, defense against the dark arts, the gardening class with the screaming plants), disengaged in classes that would have equivalent perceptions of boringness (history of magic).