We don't really have any strong national football code - none of Australian Rules, union or league can really claim to have a good club in every capital. Aussie rules is the closest I suppose.
Football in Australia used to be a migrant sport, back in the 80s the clubs were actually called SC Croatia, Brunswick Juventus etc. Since then the various versions of our FA have been trying to force clubs to avoid ethnic alignment, but there was a fair bit of argy-bargy between fans from the various Balkan backgrounds during the 90s, for example.
Meanwhile the AFL is actually a much bigger sport with eg the Italian and Greek migrant populations in Melbourne, and rugby's bigger in Sydney.
I'd love us to have a competitive league, the FFA and the A-League are the best authority and competition we've had so far and that's the only way the sport will get stronger I guess. Hypocritically though, I can't really be arsed following it.