Controversy.

This is coolbert:

For over seventy years General Eisenhower his handling of the military operations on the Western Front of the Second World War continually called into question. 

This is normally termed the "Broad Front" or "Narrow Front" controversy.

For particulars read this Internet Armchair General article by the famous author Carlo D'Este.

"A Lingering Controversy: Eisenhower’s ‘Broad Front’ Strategy"

"The war of words over the choices by which the war might have been won was, in the end, all but irrelevant. Not only was it politically impossible to have permitted the British to win the war by means of the narrow front, there is ample evidence to question if such a drive, if mounted, could have been logistically sustained beyond the Ruhr."

Eisenhower generally has been seen by some as a "timid" commander [a term highly pejorative in the military context]. Ike preferring the slow-but-steady  approach rather than a risky attempt at one massive concentrated breakthrough offensive [a rupture of the German defenses] with as a possible a very quick end to the war.

Eisenhower also very aware of the Great War and the Hundred Days Offensive.[1918].

One-hundred days at the end of the Great War a SERIES of offensive actions of the allied combatants [British, French, American]. NOT one single military operation going to decide the fate of the war and end the conflict quickly and that understood by everyone to be so. A hard slog for four years was only going to end with a continued hard slog.

Not Montgomery, Bradley or Patton satisfied with the decisions of Ike. Recommendations of the SHAFE planning staff prior even to D-Day suggesting the "broad-front" strategy the best [as is mentioned in the Carlo D'Este article] and in hindsight this seems to be correct.

Great image too thanks to Yousef Karsh.

coolbert.