HE DOES NOT HAVE AN ELEMENT ADVANTAGE!! Just because he has fire style that could beat wood style, that does not mean he has elemental advantage. His fire may beat Hashi's wood, but Hashi's water beat Madara's fire. And since Madara didn't have anything to trump that, that gives Hashi the elemental advantage. And Kurama was tamed by Hashi because his wood style suppresses the power of the 9 tails. The only thing that Madara had over Hashi was his EMS and since Amaterasu is a slow burn, and his Susanoo has been shown that it can be beaten, that only leaves Tsukuyomi. We don't know how good Madara is at Tsukuyomi, we can't assume he had an advantage.