Qatar, yes absolutely, though they are now going to supposedly publish financials. Emirates have always published full financials, and are
not that heavily subsidised, good thing
BA never gets subsidies
EY is probably going to be gone or massively restructured quite soon, yes. Qatar will continue to exist with heavy state support as long as they have oil revenue. EK is quite stable and self sufficient, and an extremely well-run and professional operation. Where BA operates 30 year old aircraft and has a fleet with dozens of different aircraft types, FAs on all kinda of different contracts (MF vs WW?) and clearly struggling to maintain the airworthiness of their aircraft, I don't see how you could think BA would survive EK.
Both have similarly sized fleets, yet EK has just three types of aircraft, A380-800, B777-300-ER and B777-200LR (10 of the latter, ~150 of the 77W and ~105 of the A380). Thus EK is an arguably
much larger airline operating a fleet with over 110,000 seats, in a much more efficient route network, better employee contracts and less legacy rot. And they serve real French champagne and every single business class seat in their fleet is lie-flat, even on 40-minute flights... Try CE to IST on BA...lol