Four generations of Naruto are very strong. Why can't you beat Kyubi no Youko?
Besides, besides flying Raytheon, Namikaze Minato's Ninjutsu is the strongest spiral pill, while Kyubi no Youko is different. Kyubi no Youko is the strongest one in bijuu, and no one can completely suppress Kyubi no Youko except between pillars and Naruto. Senju Hashirama can defeat Kyubi no Youko, relying entirely on his wooden shield minister, which is also the strongest blood boundary, and can perfectly suppress Kyubi no Youko. Coupled with his immortal mode, Kyubi no Youko is like a pet in his hand. Let's talk about celebrities again Celebrities are the strongest fire shadows of all ages. He developed the spiral pill, and with his own magic, he and Kyubi no Youko have become the most perfect pillar force.
Namikaze Minato, the fourth generation of Huo Ying, is famous for its yellow flash, which is very fast. But it is impossible to completely suppress Kyubi no Youko. Just like the two super Huo Ying mentioned above, everyone has his own specialty, although Namikaze Minato also has it, and that is his flying Raytheon skill. But if you want to beat Kyubi no Youko, it's still impossible. Even if Senju Tobirama, the founder of Raytheon, wants to compete with it, it is basically impossible to achieve it. Kyubi no Youko can only be defeated by our own powerful strength, and it still has an aura. Obviously, Namikaze Minato didn't have these two kinds, so he finally tried his best to use the ghoul seal, and only sealed the negative chakra.
Therefore, it is obvious why Namikaze Minato was defeated, just because of this problem, because his strength is completely insufficient, and he can escape at most.