I''m not blaming him for that problem during the Seven Days but just pointing out that poor staff work played a role. I am "blaming" him for never adapting after that.
For some reason, Lee if not the entire Confederate military organization never got its act together in terms of setting up a workable staff system at both the tactical level and the strategic command level. At least the Union was able to do better in that regard; notwithstanding General Halleck's flaws, his main strength was in administrative staff work at the central level. And Grant and many of the Union commanders had larger and more effective staff organizations than did Lee.