Either that or he had the resources the Confederates never had, and in the end that vast resource pool made the difference. Not taking anything away from Grant, just providing cold hard facts that eventually tilted the war to the Army of the Potomac.
All the other generals who preceded him had the same resources, and all save Meade failed miserably using them. I can't think of any of the other generals who had the knowledge, leadership ability AND personality to survive the politics that Grant had or developed.
Grant served in the west until 1864 and never lost a battle. He out-maneuvered and forced the surrender of two rebel armies. His Vicksburg campaign basically went against every established military maxim on supply and communications channels and wound up cutting the Confederacy in two. Grant's genius was well established before he came east.
Some how or another, a lot of folks have come to believe that victory or defeat of the Confederacy rested solely on General Lee and his Army of Northern Virginia. This is not the case. The war was fought over thousand of square miles and in most Southern states by thousands of soldiers not in the Army of the Potomac or the Army of Northern Virginia. Someone once stated the Lee’s defense of Northern Virginia was akin to saving the front porch, while the rest of the housed burned down. That may well be a very accurate appraisal of events.