Arpita is a good singer,has got looks and she is intelligent. But she didn't use it to her advantage.
From the start, everytime Anubhav, Arijit,Shamit...were in danger zone with Qazi,
She used to make statements(not for her benefit) which were not liked by Janta.
Gurukul students called her 'Punga girl'
She had a few arguments with Amit,Ruprekha which were shown on tv
After watching all this, it created negative vibrations and she couldn't get janta's love (by way of votes.)To add,she voted out Arijit. And that led to her exit.
Otherwise at times, faculty and judges had praised and saved her before.
Only thing she should have done was not to talk.
Otherwise I feel that she was very talented.