Dexter is being an idiot. It's also frustrating that the show seems to know it's not making any sense and despite this, are hell bent on following it through.

At some point in the season, I think the writers realized that Dexter's sabotaging made no sense. This wasn't like his brother or trinity where there were real draws for Dexter that made the whole thing personal for him. And so instead of actually writing a story in which Dexter is pulled in for legitimate reasons, they just repeatedly have the character say that this is so important to him, that it's personal, that the kill is going to be his. There's this weird disconnect between what the character is saying, and the things that are actually happening in the plot as well as character history and personality. They have him claim things like, "after all he's put me through!" except, he hasn't really been put through anything. Which makes this whole season so smurfing weird and nonsensical.

And a videogame where you play as famous serial killers IS creepy and offensive. Especially bringing it up to someone whose wife was murdered by a serial killer. Jesus christ, this intern. The way they've been shoving him down our throat this season, I'm sure he's going to end up being part of some twist during the finale. Maybe he's the one who finally figures out Dexter via his magical computer abilities, ie: being able to look at browser history.