A small hooker will tend to struggle if the props are getting battered. Its possible Agar saw that and felt it was unfair to leave him on in that situation? That would be the most positive view. The most negative would be he's picked on a young rookie while more experienced players have played embarrasingly badly. Who knows?
I see Schoey had a dig. This time its a fairly reasonable view - the same as most fans. Although I'm not sure about having a specific go at the halfbacks is right, he's right about the pack being lightweight.