"Montgomery's problem was twofold. First, he had an inflated opinion of himself (even more than Patton's). Churchill later said that in defeat, Montgomery was unbeatable, but in victory, he became unbearable. Second, his verbal daring was not matched by his methods. As at El Alamein, he seldom commenced an offensive unless he had overwhelming superiority and could not fail. Marketgarden was the exception, and the failure stung him badly. Moreover, the Chief of the Imperial General Staff, Field Marshal Alan Brooke, had minimum admiration for Eisenhower and kept feeding his angst privately to Montgomery. Warren Harding once said that his enemies were no problem, he could take care of them: "It's my goddamn friends that keep me awake at nights.""