I actually gave up at the final boss. I was willing to tolerate the card mechanic for the sake of learning the lore and story, but the final boss broke me. Maybe because I wasn't "truly" learning how to play the game, but I absolutely could not take it anymore. The card mechanic is one of the most infuriating concepts I have ever had to deal with in a video game. Truly, I wish this game was turned into a movie in the KH collection.