I don't think they're literally the worst defense in the league in the 4th by any means. It's just a real flaw that has shown up in a lot of games. It cost them the Packers game, it cost them the Dolphins game, and it made things uncomfortably close in both games this week. It's not going to stop them from easily winning the division, but it's the biggest reason I don't think they can beat LA and/or NO.