that one guy wrote:I say that because he knew from the beginning he wouldn't be able to get along with Saber, but when it turned out to be a female, he just went over the edge with "There's no ****ing way this will work well." To the point where he didn't even talk to her.
That has nothing to do with his downfall...
Stop going so random.
Kiritsugu becoming emo has nothing to do with his Servant... Saber did almost everything she was told to, mind you. Heck, even Saber described him as "ruthless, emotionless man who fought like a machine. The perfect Magus."
And the fact that Saber is a strong Servant doesn't change; even Kiritsugu acknowledged that.