I think that, while true, that's a different matter. The inability of the Russian Air Force to establish air superiority is not necessarily related to dogfighting losses. As far as I know, Ukraine currently doesn't have much of an air force either.

I don't think Russian combat airplanes are being shot down with "nerf guns" either. For whatever reason, they haven't been able to establish superiority, but how does this relate to dogfighting skills?