A British army was defeated in New York at Saratoga.
Washington crossed the Delaware and captured the troops of Johann Rall quartered in Trenton.
In the South, the British could defeat an American army at Camden, but, shortly thereafter, large British detachments were annihilated at Kings Mountain, Blackstock farm, and the Cow Pens, forcing Cornwallis to move out of the Carolinas.
There was a large peace party growing in the English Parliament. The war was costing Britain enormous sums.
All this without French aid.
With or without French aid, the Americans were going to win eventually.
If you want to minimize their contributions, fine, but I stand by my original statement.