Rikudo said Kaguya was better when Madara had only 1 Rinnegan.
Not only did Hagoromo say that Kaguya is above him, Sasuke is the one who confirmed that he's far below Kaguya. Not Rikudo.
Kaguya doesnt know how to fight properly which gives Madz the edge.
Yet Sasuke and Naruto would have died fighting her hadn't it been for the help. Yet she was an active participant in times of war. People need to stop with these kinds of excuses.