Then why is Madara screaming and Black Zetsu so confident.
If he wasn't going to succeed then it would be pointless to introduce the concept of Kaguya in this fight at all, Kishi wouldn't have done a BZ betrayal if Madara was going to win, it would be pointless.
I do agree with your statement, some people seem ignorant... If a practically dead Obito staved off Black Zetsu for as long as he did, why would a practically fresh Madara go down so easy? Granted he let his guard down around Zetsu but, sill... it ain't over by a long shot.