Damn, there's not even a nugget of accurate information in there.
"Liver problems" can absolutely self-resolve, and typically do until the body is no longer able to compensate for the dysfunction. Changing your diet could resolve some liver problems, but it is unlikely to be due to the addition of a single new source of protein by itself.
Mercury forms compounds in the body that are lipophilic, aka attracted to fats. Your brain is mostly fat, so, just due to the nature of your circulatory system, the mercury will build and build until you start experiencing symptoms. By that point, there's nothing doctors can do. There's no way to remove mercury from the fatty tissues in your fat head, yet. Meanwhile, you're losing 10 IQ points per month.
Let's not even talk about food-borne illnesses from improperly prepared meats. Suffice to say, don't do this. If you know how to prepare food so it is safe-ish to consume raw, you may slip up one day. The result could be a tummy ache, or acute liver failure. People definitely do die from food poisoning. If you choose to pursue this diet, these are the risks you accept.