There were loyalists in the colonies, of course, but they were somewhat fewer than that:
https://en.wikipedia.org/wiki/Loyalist_(American_Revolution)
Historian Robert Calhoon wrote in 2000, concerning the proportion of Loyalists to Patriots in the Thirteen Colonies:
"Historians' best estimates put the proportion of adult white male loyalists somewhere between 15 and 20 percent...
"Before Calhoon's work, estimates of the Loyalist share of the population were somewhat higher, at about one-third, but these estimates are now rejected as too high by most scholars. In 1968 historian Paul H. Smith estimated there were about 400,000 Loyalists, or 16% of the white population of 2.25 million in 1780."
So 1/3 used to be considered the number, but it is now outdated.
The point stands that the American Revolution would not have succeeded against the British Empire without the efforts of Washington, the Continental Congress, and broad-based social support.