Duy wasn't promoted because he couldn't really do Jutsu. While yes, he was weaker than Jonin Guy, Guy only was able to be promoted to Jonin because Duy killed multiple S-Ranks with the 8 Gates as a 'eternal Genin'. Otherwise Guy would likely be at most a Chunin (while being as strong as in Canon)
With the Eight Trigrams Divination Seal tested, Fujin decided, 'I should rest for the night. Though I am stronger, it'll be best to fight Raiga when I am properly rested. After all, that guy is someone who survived or managed to escape from Might Duy…'
Fantasy · Devil_Hex
2 would have made it (or in other words half), as the final test of ROOT is killing your partner I believe
However, when one of their farms was raided by the Leaf Military Police Force, and he retaliated by ordering an assassination of the person responsible for the raid, it all went wrong—the assassination failed and all he ended up costing ROOT four trainees who were an year away from becoming official agents—it was a significant blow to the organisation given that the trainees were lost in a failed assassination of a lowly genin.
Naruto: The Outsider's Resolve
Anime & Comics · FictionOnlyReader