I will elaborate. Lee was in contest with an enemy that could out produce him in terms of equipment and manpower and likely under the influence of a plantation run government that wanted this thing over fast he threw away manpower and equipment trying to hit home runs he couldnt afford to lose.
The way for the Confederacy to achieve its goal (secession) was to go to ground--keep the Union from winning too much & wear out the resolve of the northern population. Lee did the opposite.
Similar cultural and political factors at work as the ones that motivated Roman opposition to the original Fabian strategy, methinks.
The only way to achieve those goals was to make counterattacks - otherwise the Union could make steady advances with bearable losses.
His government of "gentleman planters" wanted a quick war with little economic and social sacrifice and Lee being of that pedigree likely didnt wanted to live a go to ground lifestyle, either.