Because we've never actually seen Hagoromo fight, so ofc i'm gonna use inferences etc..
Yeah, so madara was duped, lvl down.
The only inferences you can use for Hagoromo is the powers he handed to Naruto and Sasuke; which both proved useless to Madara because he had those powers himself and none of it damaged him.
Okay, why is this valid to this match-up?
Okay, why is this valid to this match-up?