Because Deep Dive seemed like such an epic battle, between 2 badass characters, who most likely had a grudge against each other, since Roxas immediatyly climbed the tower to get Riku. But no, they had never met before that, and it didn't make sense that they fought each other if they didn't previosly meet each other. And that dramtic move with Riku falling down upside down was ruined with Xion memories. And that whole thing with Roxas throwing one of his Keyblades to him because of Xion was just stupid. I always assumed Roxas was doing that move where Sora would throw his Keyblade to hit enemies(I forgot what this ability was called) and that Riku just managed to catch it. The dialouge was also weird, like "Why? Why do you have a keyblade?" didn't make sense. It could've made sense if they met before but they didn't. And finally, Xion's line, "Riku please, you have to stop him", that was the worst of all. Did Riku really need Xion's words to make him want to defeat Roxas with the darkness? Don't you think Sora being in a coma and Roxas being the key to wake him up would be enough? He didn't need Xion to convince him that. They also ruined Roxas's reason for going back to TWTNW, because Xion told him to. WTF. Wasn't his reason to leave was to look for Sora? What happend to that? I also assumed Roxas had knowledge of Sora being his Other, with, you know, the line in KH2 "You make a good other"?
They just ruined it all. That fight could have had a so much better back story behind it, but no, it was just about Xion.
