If you remember Yamato also fought

Aramaki

Yamato was held back by Momo's word to not engage, so she probably wasn't going all out.

That being said GB would still mid to high diff her.

Besides, the scabbards themselves were getting wrecked by aramaki, but it probably because they were recovering but even if the scabbards did recover, imo aramaki would still win but Yamato with scabbards recovered, they win. But for now, Yamato is not strong enough to beat aramaki but she could maybe beat aramaki later in the series.

Remember, Yamato's conqueror's Haki damaged Greenbull, despite the fact that Yam was in his BASE form. He gets way stronger in hybrid, and the ice powers are a significant win condition.

It hurt him, and then Greenbull got right back up.

Yamato doesn’t beat any admiral one on one.

It didn’t even hurt him

He just said that shes got good haki but notgoood enough

@A Professional Idiot mk.2 IS COMPLETELKY RIGHT

Well the fault is on Oda because the consept of Haki is too abstract and we haven't clear levels of proficiency to understand their power tiers and compare them ...