As I said, a short tenure doesn't = bad hokage.
Hashi handing out the bijuu is kinda bad. But he could handle them. And the reason for handing them out was to create a power balance. Do you really think the other villages would have sit back and watched if the leaf controlled all the bijuu? They would have all teamed up against the leaf. That would be a bigger disaster even if the leaf won, and would be entirely contradictory to the whole peace that hashi sought so much and worked so hard towards.
Hashi handing out the bijuu is kinda bad. But he could handle them. And the reason for handing them out was to create a power balance. Do you really think the other villages would have sit back and watched if the leaf controlled all the bijuu? They would have all teamed up against the leaf. That would be a bigger disaster even if the leaf won, and would be entirely contradictory to the whole peace that hashi sought so much and worked so hard towards.
Chuunin Exams — Caused the deaths of children
ANBU — Good and bad, it's been abused maliciously by those who followed Tobirama.
Police Force — Created discrimination and disdain for the Uchiha.
So in his short time period he establishes a shady group that causes problems down the road, creates a root cause for Uchiha discrimination and has the Chuunin exams lol. Then dies.