Does my sister have a superiority complex?

I have a sister. She has a loud, overpowering voice and an obnoxious personality. She's opinionated and judgmental, seeming like she thinks her way is always best. She's constantly patronizing towards me because I'm younger. She's a boxer; she loves being taller and stronger than people. She's always taking my things without permission and when I ask for them back she actually seems irritated with me, as if she believes she entitle to them. Not to mention, she doesn't exactly think low of herself, reminding us that she's the most educated person in our family. So I'm honestly wondering, does my sister have a superiority complex?