Some professors take as a badge of honour to pass only the bare minimum of students they can get away with each year, at least in Spain. If there aren't enough

Some professors take as a badge of honour to pass only the bare minimum of students they can get away with each year, at least in Spain. If there aren't enough passing grades to reach that legal minimum, they just give everyone from a certain grade up a 5.0. On top of that, there are no limits on how many times you can retake a class, it is not unusual to be stuck with the same class for three or four years until you manage to pass.