I don't think they're rubbish, but I do feel for those involved and spending so much time and effort preparing for something and it come down to certain opinions. Brits in the boxing have lost 4 times on split decisions now for example.
The commentators in gymnastics seem to be able to identify the penalties and errors and the same for diving. They mentioned a few errors here or there but they didn't see the Argie's score and suggest it was unbeatable and based on how good our lad was, I'm not sure what he had to do to better it.