His torso was obliterated, he was almost cut in half and he was left laying on the ground, defeated. Never said he was wrecked by Evening Elephant.
1. Stop saying Bijuu Dama. It's not a Bijuu Dama.
2. The question here is, how does Evening Elephant compare to this:
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Those are Mountains. Evening Elephant has two feats. Beating the crap out of Madara, and breaking through his Gudo Dama. Breaking through the Gudo Dama with a direct hit only proves that it's far far stronger than BSM Bijuu Dama and Senjutsu Susanoo Arrow. Not that it will match 12 Giant Bijuu Dama along with an attack that matched those Bijuu Dama.
YRS cut the Shinju, but fire burns through wood easier than it would anything else let alone Lava enhanced by Wind. Then there's the fact that the AoE isn't larger than what happened at VoTe either. So how exactly is it stronger?
Will it tank Night Guy with ease? No. But it's debatable on whether it would run through PS and kill Madara. I personally believe it'd do enough damage to get past and kill the user. Not to mention Beans never said it tanks Night Guy.