eh. it could be bad fanfic, not that I've read many. being a dork who is doing his own thing doesn't quite explain the annoyance someone like lily would have for james. idk, it doesn't add up because she was a popular girl who was mischievous herself, why would she get annoyed by him? IL lily but i don't believe for a second that she was humble. teenage ego, being popular, brilliant, beautiful would make it impossible for a 15 year old. snape and resentment cause boys get more attention, maybe.
I mean, she says it himself in SWM: He’s arrogant and she’s not here for it. On top of that, she knows that he bullies her best friend. Yeah, Lily was cheeky and mischievous too--and we can’t forget that little mouth twitch she had re: Snape’s spell being used against him--but I think that SWM also made it clear that Lily isn’t blindly impressed by pranks, quidditch skills or super-sized egos, all of which James had and many of which James demonstrated in a weird, badly timed, roundabout way to ask her out. Lily was turned off and it’s not too surprising to me.
IDK I just believe that ultimately James had a good head on his shoulders, he just ended up looking like a jerk for a lot of his ~youth~ which, apparently, he turned around. I don’t see Lily having low standards for dudes, especially dudes who were already on her “nah, son” list.