I one out of 100s of bronies had found out why Diamond Tiara is so hated by all of you! But before I begin I must warn you this isn't my original theory, I'm just explain to a location where you people van understand why Tiara is so mean... So let's begin!

As you all should know or already know, Diamonds family is rich. But they can't be rich for nothing (unless it's been transferred from a family member.) so Tiaras Parents own a successful business, and may even love her dad so much, but sadly her dad is too busy for his own daughter with work. But to be remembered as a dad, Tiaras dad gave her that Diamond Tiara one the day she was born as a gift and she loved it very very much. so when her dad was to busy for her, Diamond feels neglected and negative for feeling like a past memory in her dads mind to her own point of view. But he never was... With the gift they gave her that she still treasures today... Which makes leaving the poor girl to be all alone in her lonely home would make her feel worse... But if you ask "Hey henryhawk! Why can't her mom just spend time with her??" Well since we havnt seen her mom even once, it could mean several things: she could be away in a trip far or even out of Equestria, she's been divorced with Diamonds dad, or could even be DEAD. Who knows? But when she was about at a stage of a really young pony, she didn't want others to see that she was a sad and lonely girl who did nothing but say home alone so she decided to chance her personality to a more nasty and unlikeable tasty and made a friend who seems to like her for numerous and unknown reasons so she can let her feelings and stress all out on someone who has a happier family like the cmcs (cause they have family's who have time for them.) to make sure what it feels like to have something they don't have, like cutie marks. That's why she makes fun of them for not having cutie marks. Or she could get this personality from her dad when it came to business acting and to face the world for all of its sinister tricks and she met a friend who had the same problem with her family. She even probably knew why no one ever hated her (besides the cmcs) because she has YOU to spit or curse at her, so the students in the background stay silent to her actions. So overall it's not her fault her acting like this, it's her past and relationships with her family to act the opposite of what the viewers want to see in a TV show.

So there ya have it, I may have left a thing or two out but if I remember what it was, I'll post it again, so I hope you change your opinion or act a little nicer to Diamond Tiara and hate more characters like prince blueblood, flim, flam or giulda. Thank you for your time!