The long-standing confusion in Gao Yang's mind was finally resolved. Now he finally understood why Tomler would set up a trap for them out of nowhere.
To put it plainly, Tomler's plan had a much higher chance of success than failure. As long as Gao Yang accepted the mission, the destruction of Satan Mercenary Corps would have been almost inevitable. However, the final outcome defied all odds; Satan escaped a seemingly certain death and then carried out a crazy revenge operation.
In fact, Tomler was very close to succeeding. Although the ambush attempts by the Iron Madonna and IS failed, the chemical weapon leak should have accelerated Satan's demise more thoroughly. But Bruce exchanged his own life for the lives of the others, completely derailing Tomler's entire plan.