Complex sentence: Schacter was not convinced by Sullivan's criticism of Foucault and social constructionism, and found his account of the "Prohibitionist" view to be overly sympathetic and his attempt to critique the "Conservative" view ultimately unconvincing.
Split into simpler sentences: Schacter was not convinced by Sullivan's criticism of Foucault and social constructionism. Schacter found Sullivan's account of the "Prohibitionist" view to be overly sympathetic, and his attempt to critique the "Conservative" view ultimately unconvincing.