Library criticism could be developed more as well as restaurant criticism, theater criticism, film criticism, literature and so forth. Look at a favorite library and critique it.
Are there any theories we could use as frameworks for our critiques? When I was in library school I always thought it was light on theory. Mind you, I was not taught about Ranganathan's laws of library science.
Is there a post-modern, post-structural theory of libraries? If so, what would it be?