I just read your post and I felt compelled to reply. Taking those pictures must have taken some guts..
I suffered with b Acne for most of my life too, horrendous condition, almost as bad as yours but without pitted scarring(thank the lord). Mine was directly related to copper toxicity. Since getting my copper under control, my b Acne has disappeared. Since you say you have liver issues, copper is likely to be a problem for you(amongst other things Im sure).
You say you are unable to tolerate many supplements but have you tried focusing on your diet much? I know you also said that you feel nauseous upon eating but you didnt specify(in this post anyway) what you are eating on a daily basis. I would suggest slowly introducing fats into your diet, if this sounds too difficult you could start with chicken/beef bone broth and raw milk or other raw dairy if you can get your hands on it. Those foods are extremely nourishing to the body. Doctors back in the day treated severe health conditions such as TB with such foods. I would most definitely advise digestive enzymes with any food you do consume. The combination of digestive enzymes and raw milk will also help to fight your parasite issue.
I had to rebuild my body from the bottom up. It took five years. If you want to pm me feel free to do so. You hang in there. Warmest wishes, Ellalouise