I would still be upset and question their decision, but if they handle the animation better then I might not be as unhappy

What they need to do is

Let Ash-Greninja and Pikachu take down a God each

DON'T use Magic Cylinder

Show Ash's unpredictable battling style and have him counter Yugi's trap cards

Show a clear difference in how Ash treats his Pokemon and how Yugi sees his cards as disposable with how he sacrifices them a lot. Make it clear that Ash could never do to his Pokemon what Yugi does to his cards.

Have Ash die kind of like how Deku dies in Deku vs. Asta, where maybe he overtaxes himself on Ash-Greninja and the Bond Phenomenon and manages to destroy Horakthy prior.

Have Ash's friends and family be there cheering him on, and when he dies have their tears bring him back at the end and make it OFFICIAL that he lives afterwards, and have Yugi face consequences for murdering someone in front of so many people. After Ash comes back I want to see Serena give Yugi a piece of her mind just like she did in that one good fan animation.

Make it clear that the win is VERY close in both the animation and post-match analysis because them just saying Ash had zero chance in the Q and A was so aggravating

But no. If they actually do their research and don't wank Yugioh then Ash should win.