"I was not heard, cared for or believed, and all these things must be eradicated from society, because something went wrong there," she said.
Maroney, now 22, won gold and silver at the 2012 Olympics as part of the USA Gymnastics Team, known as "Fierce Five."
"I Wore That Secret"
She said she talked about her experiences in October during the #Metoo movement and broke away from her shoulders.
"In a sense, fear has changed to fearlessness when I knew it would help so many people," she said. "I carried this secret around with me, a lot of people say it's capable of speaking, and that's really it."
In her remarks, Maroney also beat USA Gymnastics, the US Olympic Committee, and Michigan State University for protecting Nassar for so long.
"My team won gold medals despite" USA Gymnastics and the Olympic Committee, Maroney said. "They do not build champions, they break them, but we'll change that."
Her gymnastics teammates Aly Raisman, Gabby Douglas and Jordyn Wieber have also said Nassar abused her in his role in the team.
Maroney said it was valuable to those statements and statements Hear others in the #Metoo movement.
"In everything I went through, it was almost impossible to believe it had happened to me, and I have to listen almost over and over again to accept it," she said.
"USAG, MSU and USOC continued to look away to protect their reputation, all that mattered to them was money, medals and it did not seem to be anything else," Maroney said. "They demanded excellency from me, but they could not give it to us."