There like 56 versions of MJ and some have wildly different character traits, visual features, and relationships with Peter, to claim that MJ is "supposed to be" anything just betrays ignorance of the franchise
The fact that you dismiss that there is a baseline MJ on which all subsequent MJs are based on to at least some extent but generally have the character wholly intact betrays your ignorance of not only the franchise but of the comic book industry in general.