It should be abundantly clear that one of the biggest reasons for the Chicago Bulls' underperforming as of late has been their lack of stable veteran leadership. This team simply needs more out of Nikola Vucevic if they're going to right the ship.
First off, we should acknowledge that Vuc would likely be better suited playing on a contending team right now. It wouldn't be wrong of him to desire a change of scenery, and much of the Bulls fanbase is past ready to move on from him. But while he remains in Chicago, the effort and tenacity have to ratchet up a few notches.