Pretty Dumb Die Hard has really lost its way. What worked so perfectly for the first film, and so great in parts two and three, is now all gone. He's not an everyday kind of cop like he was, doing some pretty wicked but real world believable things and just barely scraping by. Now he's doing things like jumping onto flying jets, piloting them, firing missiles, taking on the entire nation of Russia, and so on.
This movie is just not very good. Even the comedy lines are falling flat. They need to get back to what made this franchise so great or just pack it in.