Its actually a lot deeper than you think it is.
Its all about the coming of age and the realization that the self isnt as important as teenagers make it out to be.
I would like to go into all the little details of how each boss is a representation of different aspects of Scott's psyche and how the whole point of the Ramona isnt for fighting for the love but for fighting for maturity, but I'm honestly starving right now, so I'mma go get foods.
Needless to say, Scott Pilgrim is a goddamn Masterpiece and should be treated as such.