In my opinion, too many uninformed commentators perpetuate the myth that First World War military commanders were incompetent.  Early in the war, commanders were unable to cope - the war was beyond their comprehension.  This changed as the war progressed.

The term, "lions led by donkeys," was a book by Alan Clarke in 1961.  Subsequent historiography has been more reasonable and objective in its treatment of First World War commanders.  Changes in both tactics and technology ensured that by 1918 there was little resemblance to the earlier period of the war.

In the last 100 Days, the British Army used "blitzkrieg" tactics successfully coordinating the use of infantry supported by tanks, artillery and aircraft.  Unfortunately, this was also forgotten after this war, except the Germans studied why the Allies had been successful and adopting these tactics for the Wehrmacht in the 1930s.  The British Army had to re-learn in 1941 onwards what had been forgotten in 1918.