He had lost New York and Philadelphia.

But, like William III of England, who in his long struggle with France hardly won a battle and yet forced Louis XIV to accept his terms of peace, Washington, by suddenness in reprisal, by skill in resource when his plans seemed to have been shattered, grew on the hard rock of defeat the flower of victory.
There was never a time when Washington was not trusted by men of real military insight or by the masses of the people.

But a general who does not win victories in the field is open to attack.

By the winter of 1777 when Washington, with his army reduced and needy, was at Valley Forge keeping watch on Howe in Philadelphia, John Adams and others were talking of the sin of idolatry in the worship of Washington, of its flavor of the accursed spirit of monarchy, and of the punishment which "the God of Heaven and Earth" must inflict for such perversity.

Adams was all against a Fabian policy and wanted to settle issues forever by a short and strenuous war.