That's because they don't understand football. They think any goal that goes in should be saved, so five goals going in means the keeper had a nightmare.
He didn't have a nightmare, not aware he was at fault for any goal today. But saying that, he's not convincing and I do wonder what effect he has on the confidence of our back four. Its a tough one for NA in the fact not one of our three keepers has been convincing. Could be wrong but I think NA has decided he's going to stick with Boruc.