Rolling Stone is an American monthly magazine that was founding in the late 60's San Francisco, and focused on music and pop-culture. But like many in entertainment, they forgot their goal is to entertain, become full of themselves and try to be more "relevant" -- and since that's not their core competency, they usually screw it up. Which is a shame, because we need shallow tripe and escapism, without SJW's trying to take everything over and make it important. Especially when they have a history of being not very good at their core competency (covering the music scene).
They were founded in 1967, and were slow to grow out of that era (probable because of the Publishers biases: perpetual hippies at heart, while the world and music left them behind). I don't mind their bias in music, as Classic rock of that era was pretty great, but it's hard to pretend you're "with it", when you just aren't. And even then, they did things like dismiss Led Zeppelin when they were relevant (only catching on that they were an iconic force in 2006 and a cover story, "the Heaviest Band of All Time"). They missed hip-hop, panned heavy metal, and as recently as 2003 their "100 Greatest Guitarists of all Time" had named only two female musicians.
More than that for me was as Jonah Goldberg put it, they had "essentially become the house organ of the Democratic National Committee". And even when they aren't just parroting the DNC, they're known most for their journalistic screw-ups, like:3 items