Really all they are seeing is liver injury but calling it viral. I'm not someone who denies all viral pathogens exist, but I do believe Hepatitis C is another hoax.

There was a theory about it a long time ago, even one written by a fairly respected mainsream journalist. https://www.bibliotecapleyades.net/ciencia/ciencia_virus33.htm

the late Nick Regush, at ABC News. He had serious questions about hepatitis C. In his weekly column, he wrote: "Consider this a challenge in progress. This scientific adventure raises the question of whether the hepatitis C virus, blamed for a major silent epidemic of liver disease and even cancer, actually exists. That's right. You read this correctly: I am raising a question that may disturb scientists and hepatitis C patients alike. But I'm raising it anyway because it is vital to do so in the interests of public health. I'm issuing a challenge to the scientific community to present me with the published, peer-reviewed scientific evidence that such a virus actually exists - namely that it has been properly isolated, according to accepted, fundamental principles of virology."