i can understand why people wouldn't like his behavior but, come on.
you already knew that he was really goofy (just like the lead character) so what did you expect ?? this is not a realistic story ............................. the idea is a fantasy world where, a hero has a good heart/has the will to help others = the savior/leader of a clan.
so if you are looking for something realistic, then you are looking in the wrong place U_U.
Hashirama is goofy but he was no fool, a light hearted goofy character that turns into a beast on the battlefield ..................... reminds me of Goku and Goku was awesome.