With 18 games left in the season, the Bulls sit at 31-33. They're tied with the Detroit Pistons for the seventh-best record in the Eastern Conference, and there are a number of teams clustered together for those final two playoff spots.
The Bulls are 3-4 since they shipped off Taj Gibson and Doug McDermott. They're not the same team with those guys gone. Their -2.3 net rating during that span translates to a roughly 35-win team. They were playing like a 38-win team before those two left, and there's absolutely no indication that the Bulls will figure anything out in this last stretch to improve those numbers.