did anybody ever know what was going on with education standards in hogwarts

like aside from math being a FUCKING ELECTIVE, is what lockhart’s second years learned completely different from what lupin’s second years learned? and like what were the OWL and NEWT scores for lockhart’s year? did snape cover the same material as slughorn because there was at least some bare bones standards for what had to be covered every year? were transfiguration and charms and herbology the only classes to be graded consistently and fairly? did anyone actually know what they were doing? was dumbledore just playing video games up in his office?