Why do I feel that Red A is the strongest servant?

From the point of view of the game, FGO's red A is called a 2-star follower and has a 4-star title.

From the setting point of view, the explosion of red A (regardless of two loopholes such as the nuclear bomb arrow fairy), after all, EA can split the military potential of the king, but no, red A is actually not strong.

From the animation point of view, Sparkle was cut so hard that even hyenas could blow him up. . . Of course, people who are familiar with the setting know that this is due to personality. In fact, what you can see is that red A can't even beat Kuchulin.