Failed ICND with 720

I really cant understand the reason.

none of the questions were out of this world ! i knew all the questions VERY WELL!!
In troubleshooting i got a question in which 3 routers were not able to communicate. I added an RIP network and all the 3 routers were working fine!!! all ping and stuff!! That was a SIM... And in the score i just got 40 % in troubleshooting!!! How is it possible!!
I figured out the mistakes in other 2 troubleshooting questions just by looking at them!! (i cant disclose the questions here!!) but i am 100 % sure i was right! Donno where this result came from!!
anyways thats it! no more CCNA . i agree i am a looser !