The two things I don't like in the game is one, how the training minigame is a hassle and takes too much time in my opinion, and 2, is there's no forward button for digital world battles and challenges. I don't mind the grinding, it's the game's challenge and it's a bit fun. But I hate things that drags out the progress. There's no smooth sailing in this game after all. Just you, carving your betterment with patience and effort. That makes this game worth it.
Just that, 2 things I hate no fast forward options for digital world battles and challenges. And the training minigame.