Adrian Zenz has not been "throughly discredited" as you say, quite the opposite. The ad hominem attacks from Chinese bots/trolls (apparently he's a Christian fundamentalist/extremist now) are a pretty good sign that he is reporting on exactly what they don't want reported on.
Also please don't link to thegrayzone if you want any further argument to be heard with an open mind. They have a terrible track record of defending authoritarians for political reasons.