i think there is no need of justifying any body about your failure.Your opponents wouldn't believe on explanations and your friends dont need any .Only you know how hard you have tried to get through.try to explore your faults inside.dont advertise them.People dont bother about them.Only your parents would care.
I have faced this situation last year.Dont let any ill thoughts flourish in your mind.I know words are not sufficient to explain the situation but in either case reality is reality.
Best best best of luck dear
Pray for all hard workers