Not really that important

I'm a little annoyed that my dad bought my brother a nice calculator, while I had to put up with my calculator having a stain on the screen for 3 years! 

It's not that bad, but it still bothers me, I feel really bad about it, and it hurts a little.

Sometimes I feel that my parents and grandparents have a better relationship with or love my brother more than me, even though he is ungrateful and doesn't even try hard at school. 

My mom always buys him really expensive games, and when I try to tell her it's too expensive and that she should just put it away, she tells me not to bother my brother and to shut up.