People are told that the authorities have it all under control and the experts can be trusted. Then they discover that the experts are human, fallible, and sometimes incompetent or corrupt.
Since the original message was one of unqualified absolute faith in the experts, the backlash is to flip over to believing that the experts are satan incarnate and pure evil and always wrong.
It reminds me psychologically of the arc of an immature relationship. First they’re perfect, everything about them is perfect, they’re going to be your soul mate forever. Then you catch them in a lie or they do something embarrassing. Then you get the screaming breakup. Everything about them is the worst now and you never want to see them again.