Agreed. I ADORED 5Ds when it was doing it's intro arc and then everything leading into Dark Signers and all that good stuff. It was amazing for just a children's card game. I mean, yeah, it was a little too serious business, but that made it really stand out by making it all come together well.
And then literally it all goes to shit after Dark Signers. There were some awesome Yusei moments still.
Fuck that ending