Hello Saibal 
Its really painful 2 c no outcome after such a struggle. One of my friend is facing same problem.
But my point is, like it said in 3 idiots.......TRY FOR PERFECTION, SUCESS WILL COME BU ITSELF.
Dont keep unnecessory stuff in ur mind, which will spoil ur productivity
This is actually 1 of the drawbacks for CA students. We keep unnecessory pressures, worries & comparisions in mind so that v have less focus on essential things.
Its difficult to keep all these stuff out of our mind completly, but v can reduce it by practice.
Keep in touch with only positive people around.
1 final thing......all these suffering u r facing now will surely make u the better person tomorrow.
Dont leave HOPE & CONFIDENCE at any cost. Try until u reach what u want
I wish u all the best