Painful admission: Last year at this time, as the network premieres rained down upon us and dampened my judgment, I liked the pilot for “2 Broke Girls.” The CBS sitcom promised to be a positive, witty portrayal of single women.

Yeah, right. Promise is the bane of the fall TV season. Too often, the pleasures of the pilots sent to critics for review have disappeared by episode 2, after the creators have jumped into the everyday running of a show and after the network has asked them for more imbecility. “2 Broke Girls” quickly became the migraine it is today, a brain constriction of bad puns, vaudevillian sex jokes, and racial stereotyping. And I felt burned.