You are forgetting that your competitors are not only companies in Argentina (direct competitors), but also in Brazil, Uruguay, Paraguay, Chile, Bolivia and Peru. Traffic flows, especially by Brazilian, Paraguayan, or Chilean competitor can have a dramatic effect on your load factors.
Let's go through them, 1 by 1:
Brazil: I have an airline there, and it's doing incredibly well. Brazil is an oasis right now, since the 2 largest carriers have gone out of business several weeks ago.
Uruguay: No airlines operating there
Paraguay: The only airline here is my own, suffering the same SLF drops
Chile: The largest carries has gone out of business a couple of months ago. No airline has yet filled its place
Bolivia: Just one airline here, rather new and struggling. No long-haul flights
Peru: Same situation as in Chile. No long-haul flights
This week is back to normal... still don't know what's going on...
Odd. If it's back to normal, then there might have been some issue. On Aspern, there was an issue with the MAF airport. It wasn't sending out passengers at all. The calculation time was stuck at the top of the Game Status list for over two weeks. I didn't have any passengers for a long time. I have screen shots of it. So it might be something like that... I would have thought if the issue was larger scaled, it would have been announced.