My stepmom hates me

I know she doesn't like me because older sister and she got like 300 dollars for christmas while i got two shirts ( wasn't from my stepmom )She barely gets me anything meanwhile my little sister gets to have a shopping spree every two months . My little sister( her daughter) is rude all the time she always takes my stuff without asking then expects me to not take any of her stuff. My dad is fed up with my stepmom 's shit but won't leave her . one time me and my little sister got matching hairstyles before christmas she told us we couldn't get anything for christmas . my little sister got a whole bunch of stuff . while i got nothing does she really hate me or am i just ungrateful .