If you are going to use this as an argument against this post then you must be the most stupid person in naruto base. I have been reading this manga for way too long. Almost since it started. I did not missed any chapter. One thing is what he said and other way different what minato had done in his short life
There is always going to be failures there are no perfect person. he didn't fail in the most important things the way I see it The ones who really failed were the previous kages. The reason why the villages started getting into war was because of Harishima. He introduced them "POWER" of the tailed demons by giving it away as "TOOLS". If the tailed demons wouldn't have been treated as TOOLS like harishima did then they wouldn't have had this much hatred towards the people. The uzumaki clan was completely destroyed because of harishima action. Uzumaki clan were masters of seals and other villages wanted to gain power of those seal so they can use them on the tailed demons. Harishima started the first war and was unable to stop uchiha madara.
Tobirama the second hokage, was the reason why uchiha madara became dark or started looking for other path. Tobirama was also creator of a jutsu that killed many ninjas in the current war. Tobirama was the sole reason why the uchiha and konoha leaf never got along. He was a peace breaker and started the second great war.
The third hokage with his ideals, he started the third great war between villages. He was unable to stand up to the superiors like Tsunade did so many times. He just sat there in agreement. Wasn't able to stop Uchiha itachi from killing the entire uchiha clan. This led to sasuke resentment towards the konoha people.
Minato was the one who stopped the third great war. He was the one who stopped single handed the raikage secret missions to stir wars or steal the nine tail demon fox. He saved kushina. Third raikage himself said that he had many encounters with him. Minato earned respect from the cloud village and other villages. Minato was he one who stopped obito from gaining possession of the nine tail demon fox early in naruto. He was the one stopped obito from totally destroying the konoha village. He was the one who was fixing all what the other previous hokages had horribly failed to manage. He was the one who was fixing them all. Minato saved kakashi, gai and all those shinobis that played big big role in naruto. Minato saved naruto and entrusted a power he KNEW naruto could use someday. As it is right now, he is the one who is still up, harishima is down, tobirama is down, sarotobi is fighting something that oro team was able to stop. the five kages were struggling in defeating this new mask man. Oro team showed them how it really it's done. Minato is right there next to naruto sakura gaara kakashi. Guess who is going to save them? minato will have to save them from madara. I would think twice before saying anything