Is Minato Namikaze garbage?

Yeah. . I think the poster misunderstood.

Minato could have suppressed the Kyuubi, but he was released after Madara used a trick to lure the tiger away from the mountain and left Kushina's side.

It’s not that his wife would die with him. Kushina planned to bring Kyuubi back to die together in the hope that Minato wouldn’t have to die because of Kyuubi. But because she wanted to see Naruto grow up, Minato decided He used the corpse to seal the Kyuubi and sealed himself and Kushina's chakra into Naruto (he also did this for his wife's wish), and saw Naruto when Naruto broke through the seal or in other critical situations. .