She's no different in this than any other faction leader, or the faction itself....
The thief guild has the problem that most of the characters there seem to be on autopilot and don't change their behavior at any point in the game (aside from how they address you before and after you join the guild). Delvin is the only one who calls you boss and the ones that are in the Cistern give you some sort of recognition. But Vex, Brynjolf, Tonila, Maul and Dirge all act like automations, not changing even after you become Guildmaster.
I did not find this problem in the Dark Brotherhood or the Collage of Winterhold. The NPCs there change their attitude accordingly.
With regards to Maven, it is only reasonable that after I do jobs for her, make the decision that leads her to become Jarl, do her quest to end the Sookoma operation, purchase property in Riften, gain the trust of her people and she makes me thane, that she would adopt a more favorable tone towards my character. That she doesn't is what ruins her for me.