* Entitlement: Sharpay comes from a wealthy family, and she has always been used to getting what she wants. She doesn't understand why she can't always be the center of attention, and she gets frustrated when things don't go her way.
* Competition: Sharpay sees the other characters in the musicals as competition. She wants to be the star of the show, and she's willing to do whatever it takes to get there, even if it means hurting someone else.
* Immaturity: Sharpay is still a teenager, and she hasn't fully developed her emotional intelligence. She doesn't always think about how her actions will affect others, and she can often be impulsive and hurtful.
It is important to note that Sharpay is not a bad person. She is simply a complex character who is struggling with her own issues. She eventually learns to overcome her jealousy and insecurity, and she becomes a better person in the end.