just because everyone's not masturbating over guy doesn't mean they're a madara fanboy lmfao.
Anyway, madara couldn't react to this last attack. His only option would have been to throw up a defence before guy even begun to move, but he wasted way too much time. When guy started to rush him, guy's incredible speed caused a vacuum around him which tried to suck in air around him, distorting madara's staff and basically restraining him by making it difficult to move. On top of being restrained, guy was moving incredibly fast. There was just nothing madara could do during it...
Does that mean this attack can't be blocked? No. Someone like kakashi who likes to be cautious would have been underground long ago while a clone was standing there in his place. That's already a counter to this tech. Let's not forget guy crouched there for a while charging up, giving madara enough time to try to protect his ass, which he chose not to do. His business.