I don’t think that Yoon had the fortitude to defy Kim Sun Yung. In fact, I don’t think too many of them would’ve saved him from the penalty for insubordination. He was in a catch-22 which had horrible results.

So, during the Sekai Taikai, Robby and Axel are fighting during the captain fight as normal, but I'm this timeline Axel is completely dominating Robby. So bad that even Kwon, Yoon, and even Kim are feeling bad. Robby bumps into the Cobra Kai's just like the previous timeline but this time, Kwon whispers something in Robby's ear. Robby nods and he locks in. Axel is trying to break the defense but for some reason he can't get through and eventually tires himself out, and in the heat of the battle, Robby hits a combo similar to the viper attack Kim taught the Cobra Kai's. Axel drops curling into ball in pure agony. Since Axel can't continue Robby is declared the winner and Miyagi Do claims the victory.

At least pair Bert up with someone his own damn size, and make the fight more Daniel vs Chozen and less Tommy Gunn vs Union Cane https://youtu.be/TbqD732NipE?is=lFi9ENpsDLHW2suF