Why is saber the most incomplete enchanter in Destiny's Night? Why did they destroy the holy grail?

Question 1. Cybertron, as King Arthur, is still alive. Strictly speaking, she is not a ghost, but a "person classified as a ghost" and is considered to be alive. This is because King Arthur made a contract with the world on his deathbed, and asked her to travel through time and space in the form of a ghost to find the Holy Grail. When she gets the Grail, she will really die and become a ghost. Now Saber's body is still motionless at the moment before his death, and time is at a standstill. ? So, I'm not used to the spirit body or the spirit body can't. Frozen by time before being summoned. In order to terminate the contract, she must destroy the holy grail with her own will. ? So she finally returned to England on TV and died.

As the owner is Emiya Shirou, he is a magician, but he knows nothing, which becomes one of the most unfavorable factors for Saber to compete for the Holy Grail. Because Shiro couldn't give Saber magic before transplanting the circuit.

Question 2: Actually, the holy grail of realizing wishes with destructive power is not a universal wish machine as it seems, but a filthy cup (in Kotomine Kirei) filled with blood, and wishes can only be realized with destructive power. The Holy Grail War is also a conspiracy planned by the three holy grail royalty (Yuanban, Jiantong and Anzbelen), and it is an unnecessary war. The Holy Grail can only be opened if the servant returns to the power of the Holy Grail after the defeat. The foreign owner who does not belong to the Holy Grail royal family is only a medium for the spirit to exist in the world. In other words, as long as the servant is summoned, the foreign master is worthless. The heroes who came to the competition were all sacrifices to fill the holy grail and could not realize their long-cherished wish. The royal family let the master and servant kill each other on the grounds of the holy grail war, and finally took advantage.

Because of this, Cybertron destroyed the Holy Grail. At the same time, Shiro also let her know that the most important thing is not the past, but the present, which made her give up the Holy Grail and choose Shiro.