Here’s a funny thing about Gen Lee & Gen Grant as army commanders. The Army of NV suffered about 240,000 casualties under Lee. He led two aborted incursions into Northern Territory. For the rest of the war, Lee defended a few counties in Virginia. (We will leave out loosing 1/2 of Virginia largely to Gen Rosecrans pre A of NV.)
During that same period of time, while sustaining fewer casualties, Grant as an army commander accepted the surrender of two armies, captured fortresses, opened the Mississippi River & Cumberland Rivers, took or caused to be captured Cairo, Nashville, Memphis, Columbus & Bowling Green KY.
Perhaps, in your analysis, Sheridan’s defeat of Early or the Battle of Five Forks or repulse of Gen Gordon’s attack don’t count as tactical victories, just to name some obvious examples. I suggest that retreating all the way to Petersburg & being forced to dig in & await the end is, by anybody’s definition, a very strange sort of victory.