An Emperor-level Boss facing off against a demigod, due to the differences in their power systems, would still have some watchability to the fight. But when two Emperor-level Bosses with nearly identical abilities fight, Zhou Tian's battle with that Dwarven Boss lost all interest.
Monster versus monster, the original versus the original, without resorting to a Demonic Slaying Weapon, Zhou Tian's competition against the Dwarven Boss was purely a test of their respective strengths. With that in mind, no matter how hard the Dwarven Boss tried, he absolutely stood no chance against Zhou Tian.
Therefore, even though the Dwarven Boss had accepted his fate, in the end, neither the Dwarves he replicated nor he himself could match Zhou Tian. As a result, during the clash with Zhou Tian, the Dwarven Boss was continuously wounded under Zhou Tian's attacks, and in a very short time, Zhou Tian just cut him down with a straightforward approach.