What a crock, they are probably not the best airline in the world, but they are hardly the worst!
I find it amusing how people/companies that tend to appear on 'best' lists, also seem to make it onto the 'worst' also. Personally I don't give these type of reports much credence, all that matters, is that if you enjoy the service/flight that you use them again, and the punters seem to be doing that in droves...