Ōnoki had major flaws in his character. He was destined to be unable to become the Commander-in-Chief of the Allied Forces; at the very least, the others would not readily agree to it. The Third Raikage was much the same—his temper was far too foul. How could they fight this war with such a hot-tempered Commander-in-Chief of the Allied Forces?
The people of Kumogakure naturally hoped that the Third Raikage could become the Commander-in-Chief of the Allied Forces, but the other villages would not see it that way.
Rasa was somewhat young, and his abilities were questionable. He had the lowest chance of success. Sometimes, talent was also a fatal shortcoming. Who told Rasa to be the youngest Kage? Standing alongside the others, he could only be pushed aside.
As for the Third Mizukage, with his village having nothing to offer except an s-rank rogue ninja who had joined Akatsuki, he basically had no chance either. No matter how they calculated it, the Third Hokage truly had the greatest chance of taking the position.
Whether in terms of strength or ability, no one had anything to say about the Third Hokage taking the position. Even Ōnoki had to admit that the Third Hokage was indeed quite outstanding.
"...27"
To anyone else, this would have been the kind of good fortune one could not find even with a lantern. There would definitely be a huge crowd lining up for it. Unfortunately, it was not their turn. Yet Hikaru was tossing it away as though it were a scalding hot potato.
This left Konoha's higher-ups with gloomy expressions. They could not even get a chance at it if they wanted to, while Hikaru kept rejecting it and throwing it away in every possible way. Comparing people really could make one furious.
Akatsuki