Ever since WWII, Baron Strucker has been causing misery and destruction, first as the Red Skull's second-in-command, later as ruler of the terrorist group HYDRA. It might be due to losing his position as a prince in the Prussian dynasty, or maybe he's just a real jerk. He wants total chaos and anarchy, and absolute control of the world. He also wants Nick Fury dead and all forms of democracy crushed.