Undoubtedly, relying on external forces to achieve speed surpassing Zhou Tian is somewhat difficult for that True God. However, if the goal is merely to surpass the speed of Zhou Tian's Heavenly Gods, while not easy, it is certainly not impossible for that True God.
At least, if that True God is willing to sacrifice, even though Zhou Tian's move caught him off guard, he can still ensure his Deity underlings have speed surpassing Zhou Tian's Heavenly Gods by paying a certain cost after reacting.
In a typical situation, that True God would not want to go to such lengths. After all, Zhou Tian's Heavenly Gods are no weaklings, and relying on external forces to give his Deity underlings speed greater than Zhou Tian's Heavenly Gods is not a simple task. The cost involved in this process would be enough to make that True God's heart ache.