Review of The Man in the High Castle

What was Frank Spotnitz thinking? The show was excellent through 3 seasons and 9 episodes. Perhaps if the finale was two hours long it might have been more coherent? The last time I was this disappointed in a finale was The American's. All this build-up and a totally incomprehensible, illogical ending. They should have simply blown up the portal, or an American army should have come through. Even having those on the other side sending a nuclear weapon through would have been better. Very, very disappointing.