I’ve already explained what it has to offer, interesting scenarios that the canon would prevent and being essentially a 8 minute commercial for the video game.
You’re still comparing two different designs. You’re expecting what is essentially a commercial to have the story and thought of a movie put into it. It’s like saying the It trailer was dumb because it just flashed some stuff then went off. But that’s the point, it gives you a taste and brings you back for more.
Yu Gi Oh had promotions(much like buying a DB Blu ray disc and getting a code to download Dokkan Battle) but the series itself was never intended to be a promotion.
In addition to this Dragon Ball doesn’t generally explain stuff, they just do it and MAYBE Toriyama or a guide book will clarify.
We still have yet to be given an explanation as to what Ultra Instinct is and why Saiyans have a transformation that uses it or if it’s not Saiyan specific why Goku was even able to tap into it. We can speculate but we have no true explanation. Neither do we have an explanation as to why Saiyans have a form possessing divine ki, it just happened because.
I can’t make you like SBDH nor is that my intention, but saying something is bad because it doesn’t meet exactly what you want it to is somewhat spoiled, especially when it was never meant to meat said expectations.