I think it's fair to criticize the results. Prince was frequently overmatched, and Baugh missed some blocks.
I'm less enthusiastic about fans criticizing a player's effort. First of all, we don't know if a guy is playing hurt. Secondly, a guy may be struggling with his confidence; that can make him hesitant, and slowness to react may be misinterpreted as laziness.
I don't perceive Meyer, Warriner, or Studrawa as the kind of guys who would tolerate a lack of effort if they saw it occur; and they're in a much better position, than we are, to know if that's the case.