They really did insist on analysing it in the most po-faced way.
Why isn't deconstruction and appraisal of comedy considered just as highly as going on about the films supposed intentions and talking about what it had to say in a wider context?
Perhaps Morris' main mistake, critically anyway, is choosing a topic where everyone wants to talk about the issues. He's made a film where everyone is expecting fully developed and profound political points and biting satire rather than simply something which is very funny. But that may also be because he is Chris Morris.
Perhaps it's because they're self-consciosly reviewing and can't allow themselves to be swept into the laughter fully.