It wasn't that "Hashirama" had a problem with Uchiha Gen. The real issue was that this guy actually wanted to enter the tournament. Yes, not some other tournament, but the one organized by the major ninja villages—the Chunin! Tournament!
"I haven't been ranked yet, but don't worry. I'll definitely pass the exams to become a Genin and a Chunin."
Don't worry? Is passing the exams really the issue here?! "Hashirama" roared inwardly. Right then, he wanted to grab Uchiha Gen by the collar and shake him for all he was worth, demanding whether he had any idea what he was saying.
"No matter what you say, no means no!" "Hashirama" said, his face twitching.
"All right, then." After some thought, Uchiha Gen finally chose to "take a step back." Just as "Hashirama" breathed a sigh of relief—
Uchiha Gen suddenly added, "Then can I be the referee? The guy who stands in the middle and says 'begin.'"
"Hashirama" instinctively started to refuse, but after processing what he'd heard, he realized Uchiha Gen wasn't asking to compete. Puzzled, he asked, "Why?"
Uchiha Gen said, "Because you won't let me enter the tournament."
"Hashirama" looked constipated. Despite already being dead, he could actually feel the faint stirrings of a headache. "That's not what I meant. I mean..."
Before "Hashirama" could finish, Uchiha Gen suddenly sighed. "Fine. If you really want to know, I want the tournament to end sooner. This tournament is completely pointless. I'll help Konoha win, and no one will notice anything wrong."
At that, "Hashirama" suddenly turned serious and launched into another lengthy lecture. "I believe in those youngsters..."
A victory won that way would be dishonorable. By doing this, Uchiha Gen would be robbing their juniors of their glory, and so on...
Too late to stop him, Uchiha