I saw this comment today by a guy claiming he has a degree in European History (No proof).

His tactical genius was throwing millions of men into a meat grinder. Yea he did his part to help win the war, but it wasn't like he was Frederick the Great or something. He wasn't some wily tactician, running about and winning a war of maneuver against his enemy. He had numerical superiority, and used that to win his battles. Pretty simple stuff.

Does what he say have merit?