Whereas Lee may not've shone brillance at a few things, he was a master of large troop movements and tactics. Still, the Napoleonic tactics he was using were what was the norm during that time. Yes, his junior Generals were essential, but without Lee's mind and experience they couldn't have accomplished half of what they did! Grant on the other hand was not known for caring too much for the welfare of his men. How many men did he waste at Cold Harbor in useless frontal assaults against fortified positions? Meade?! Pretty timid and cautious. Hancock was a good leader.
Despite what your assertion is, Lee is much better than this author is trying to make him out to be.