I'm surprised they don't have a mercy rule. That would have at least allowed them to bow out gracefully.
Running up a score isn't considered sporting, and as coach he could have pulled his starters in the first half when he realized they had complete control of the court, In addition, he could have told his players to back off and just have fun rather taking the game seriously.
When I was in high school, there was a team in our conference that was really bad. Games with them during that season were like a cat playing with a mouse before devouring it. Our coach had the team back off their play, simply to keep the other players in the game and keep competing. He didn't want to humiliate the opposing team, and he didn't want the other team quitting before the game was over.
So he acted pissed off when blockable shots weren't blocked, or positions were blown, but it was for the sport of it. For some people, that may seem wrong, but the opposing team fought to stay in the game. Players that may not normally get a chance to shoot were given looks and shots. Likewise, bench players on our team got play time, giving them many of the same opportunities as the starters and second string players.
Not to mention, it prevented the mercy rule from being implemented. Which is as humiliating as losing to huge scoring run-up.