middle child problem

hi, i have 2 older brother and 1 younger brother ( 3 years younger than me ). so basically, im in the middle and a girl ( their only daughter in a family ) . everyone supposed that im always getting spoiled by my parents since im the only girl in my sibling but turns out i am THE PUNCHING BAG lmao. my mom abused me since i was little. i still remember when i am 6 or 7 years old, my younger brother who is 4 years old at that time messed up my mom foundation by put it on the wall . even when my mom know that my younger brother is the one who ruin her foundation, she still hit me. BRUTALLY. as if shes hitting a girl in teenage age when im just 6years old at that time. she always put the blame on me. even when its crystal clear my brothers is the one messing around, she always find a way to put the blame on me. she doesnt care when her sons disrespect her or even calling her shit infront of her face. shes can deal with it. but when im doing just slight reaction to show how frustrated i am, she will throw tantrum and act like i do every kind of things that disrespect her. sometimes i questioning god, why would you give daughter to a family who doesnt need one? are you just sending me here to let me suffered? if that was your point then you win.