The problem here is that Touma is not a good man. He is a psychologically sick man who should have been in the hospital a long time ago. To say that Touma is practically the biggest selfish person in the whole series is to say nothing. God, he's selfish enough to sacrifice all of humanity for his own happiness. As Hamazura said, you have to go through countless false layers to see the real Touma, who is entirely composed of selfishness. And that's to say nothing of his other not so good qualities, such as his obvious hypocrisy, which he doesn't even deny, on the contrary, Touma generally considers hypocrisy something good, his propensity for violence, it has been said that Touma always tries to solve problems with his fists, or that Touma is a born psychological manipulator who can very quickly find people's weaknesses and use them to his advantage. And so on, this quote explains it all very well. Any Servant who is not an idiot will sooner or later realize that Touma is not a good person.