This is the same logic that led people to believe that Sasuke would:
- Take years to surpass Itachi
- Never gain a legged Susanoo because it's exclusive to Madara
- Not achieve a Perfect Susanoo until after a time skip
- Sit out the rest of the war (people actually said this)
Applying standard ''logic'' to Sasuke doesn't usually work out. If Kishimoto wants Sasuke to surpass Madara, then he'll do just that. Many will say that the Madara that he'll surpass [Orochimaru's statement] is EMS Madara without failing to notice that Madara's Rinnegan was researched by Orochimaru; Sasuke will surpass Rinnegan Madara.
Sasuke tried to fight Madara and got broken and thrown to the side.
Please name a manga where the deuteragonist defeats the main villain in the end, I'll give you a hint there is none.
People said that Sasuke would solo the Juubi with Amaterasu and we saw how that went, people said that Kirin would be used against Juubito and it wasn't, should I keep going, I can list countless things that fanboys claim will happen and didn't happen.
You don't even back your claim with any real proof, the only thing you present is a lunatics words (a lunatic who has been wrong countless times in the series) and what you want to happen.
Madara is the main villain of the story, Sasuke isn't the hero of the story, and the hero is generally the one who defeats the main villain.