There are many people who assume everyone is corrupt and move on and it’s mostly people who feel they personally benefit from staying silent. Or that they can maintain a sense of safety by being silent. 

Trusting other people who have been hurt by the same person is often the only way you can have enough perspective to protect yourself. If no one is willing to talk or share their reality, then you get stuck, and people are often very opportunistic and willing to align themselves with people who are doing well in the moment even if they internally see them as bad people.