Why can she become like this???

My older sister really let me hate her
Previous she not a girl like this 
but now.....
No common to her
Now she 25 years old already
still stay at home...
I feel disappointed to her
She are the best in study~
She study the business before
but now.....
she say want to buy the bubble tea~
why can she become like this???
I will not like her after SPM
I will be a rich woman
I will not let anybody to look me down....
I will fight for myself and win for myself~
I will.....