I thought Cody was upset with Enzo because he was under the impression that the two of them would work together in the HOH comp to make sure that Christmas didn't win. After that, whoever wins, wins. Instead, Enzo went off on his own, leaving Cody to try and get Christmas out by himself and leaving open the possibility of Christmas not being boxed in and eliminated. Now, maybe Enzo's main goal wasn't getting Christmas out, but Cody didn't seem to be aware of that going in. I understand why he'd be upset.