Brian Steinberg Senior TV EditorKeith Olbermann must be The Worst Person in the World this week to anyone who works for MSNBC or NBC News.The longtime sports and news personality spent Thursday afternoon producing an epic 21-post Twitter rant telling of a convoluted effort to return to MSNBC, where he once served as the linchpin of its primetime lineup. Over the course of 11 years and emails and comments sent between an array of senior NBCUniversal executives that run the gamut — from former NBCU News Group chief Pat Fili-Krushel and former NBC News Chairman Andy Lack to current NBCU CEO Jeff Shell — Olbermann alleges he was kept on tenterhooks about a return to the cable network where he had once enjoyed one of his most successful career stints. “That’s 11 years of conversations about my returning to @msnbc,” he said on Twitter.
