I think people are exaggerating how committed the sporting culture of Europe is in going to support their team regardless of results.
What you find in Europe is that when teams are struggling, especially over a period of years, attendances go down, sometimes plummet. There may be some exceptions, but that's generally the case. More successful clubs have vastly bigger attendances, and the more successful nations have far bigger crowds.
Ok, the top nations with huge media coverage do very well with crowds, but look beyond that to struggling teams in leagues of similar quality to the A-League and we our crowds are reasonable. Throughout Europe, the same things happen as here, where a lot of people are more interested in watching the top teams than going to support their local team. They probably don't call it 'Euro snobbery' though I guess!