Here are a few more works in which the flat (non-arcing) protagonists aren't self-actualized in any positive way: practically every Samuel Beckett play and novel; most works by Kafka; and Robert Altman's film "The Player."

In the case of "The Player," the audience wants the protagonist to have a negative arc (punishment, tragic recognition etc.) but that doesn't happen.

I'm thinking that the point of these non-arcing but non-fulfilled protagonists is kind of meta: to challenge the notion that literature can / will / should depict a moral universe in order to edify the audience.