The good news in what you write is that it seems like it's not nationalistic but some odd cases from various countries. The conversation we are having is about reducing nationalistic bias.The only thing is that there is a young Korean skater who the officials suddenly become very confident with giving edge calls every single time, and there's a Georgian skater they pick apart everything other than a completely rotated landing is little more than +1 for GOE. Yet as you say there are recidivists with lutz take off edges (these can be identified in real time, in slow motion with a bad camera angle, etc) but the officials seems to miss it almost every time. I find this very odd.
On the flip side, I watched an American skater recently with 5/7 dirty landings in the free skate and received an enormous score, I saw something similar with a Belgian early in the season. I'm not making this up I even posted screen captures demonstrating the cheated landings but none of it affected scores.
It's all very strange to me these discrepancies.
I agree that having one or two more camera angles available would then help reduce discrepancies, but I am not sure those are due to nationalistic biases... perhaps more reputational judging, but that's another animal I would prefer we don't get into, at least in this thread. When people start talking about these, it turns ugly quickly and often, the skaters themselves are the ones receiving dismissive treatment from angry fans. I think we can avoid doing this while discussing ways for the ISU to reduce biases.