Why do "bad" kids always get attention? should i hate my sister?

Don't hate her,but i know never be happy with this Kind of situation.i think you can't do much.but you had other sister and brother,so enjoy with them.i use to have sister like yours.now we both married we are o k now.but i feel same thing like you do right now.my parents always buy her new cloth and me i have to deal with what ever!but good thing your parents secure about you,they sure you not doing any thing bad so they trust you more than her.see her weak person and enjoy life!