It was hard, Biles had said, to continue to represent an organization “having had them fail us so many times.”

“How,” she had asked, “can we trust them?”

One year out from the 2020 Tokyo Olympics, the United States championships were the perfect forum to assess the two poles of American gymnastics: the gold-standard excellence of Biles, and the continuing questions about U.S.A. Gymnastics.

Biles did her part. Her winning performance included two skills never executed successfully before in women’s gymnastics competition: a triple-double (two flips with three twists) on floor exercise and a double-double dismount (two flips with two twists) on balance beam. She finished 4.95 points ahead of the next closest competitor, Sunisa Lee — an advantage that represents a landslide in gymnastics scoring.

U.S.A. Gymnastics, meanwhile, remains a body in turmoil, cycling through leaders and still struggling to emerge from the looming shadow of the Lawrence G. Nassar scandal. Nassar, a former doctor for both Team U.S.A. and Michigan State, was accused of molesting over 300 athletes under the guise of medical treatment. Biles revealed more than a year ago that she, too, was one of Nassar’s victims.

Biles said that she still did not trust U.S.A. Gymnastics to protect its athletes, and that it was difficult for her to compete for an organization that had hurt her so many times.