Favoritism

My mom had 3 kids me my sis and my brother . her favorite has always been my brother hed get spoiled get new shoes and clothes while i had holes in mine. He was a troubled teen and so were me and my sis but hes always the perfect kid. Anyway he has a kid and another one thats not biologicaly his. My mom spoils his kids buys them everything takes care of them so he can go out or rest. When it comes to my baby my mom never wants to carry her if she does its for a short 5 min i do everything on my own wich i know is noones responsibility but mine but seeing her go above and beyond for his kids and then treat my kid less than hurts. She calls my baby ugly and says shes too much too handle and shes always calling my brothers kids beautiful and saying she loves them i never once heard her tell my baby she loves her . im just so heartbroken