MTV's president is out after only a year as the network once at the center of youth culture continues to struggle for relevance.
Sean Atkins, who came to MTV from Discovery, quit Monday after the network's parent company installed another executive over him. Chris McCarthy, who's had some success overseeing sister networks VH1 and Logo, will now supervise MTV as well.
MTV has fought for attention with a youthful audience whose allegiances change quickly. The network averaged 1.48 million viewers in prime time at the end of 2011, and was down to 550,000 for the three months that ended Sept. 31, the Nielsen company said.
During the past year, viewership declined 16...