I actually enjoy the fact that they put some fumbling loser as the protagonist finally. I mean look at Yugi, Jaden and Yusei. They all had inherit talents when it came to dueling, there was no way someone who was getting into the card game could relate with them. I mean they would be more apt to feel more connected to Joey, Syrus or Leo, the characters who had no talent in the begining but had to work in order to get better. Honestly I like how they make him lose sometimes, after all the "Heart of the Cards" doesn't always pull through. But they could of made him win at least a few more duels in the beginning. Overall, good anime and decent follow up to 5D's
Yeah Yuma has grown. But if you think about it the only real loses he has had were against Shark and Kite. All his other loses were in battles that he wasn't going serious.