Seahawks DBs were incredibly intimidated in this game, when their D wasn't sending a 4-man rush, they are struggling to clog the lanes with almost 6-7 guys out in coverage! Desperation set in towards the final 18 minutes of the game, tons of holding, tugging, and grabs. There were times when their coverage held, but there was always at least one weak matchup Kap saw, and he went for it (the luxury of all those weapons).
They couldn't handle Kap the moment he left the pocket. Beyond Sherman, Seattle DBs show a great lack of effort with handling agile WRs off of comeback routes, Sherman was getting eat up by Boldin on every matchup, and Crabs was doing his finest "Kobe" impression. Film room had to of exposed this, when Kap had time in the pocket, the DBs couldn't hold Boldin, Davis, Crabs, or Miller on the field (all at the same time).
Also forgot how Russell Wilson blew a time-out towards the end of the third quarter to avoid a delay of game penalty. That TO could have helped them later on.