Nirvanna is hands down the worst of the big 4 of grunge.
I just can't fucking stand Kurt Cobain. The dude was a massive pussy, and he gets all this love for what? Killing himself? Making grunge that isn't even close to being as nuanced, or for that matter even as catchy as his contemporaries?
And nobody gave a fuck about Dave Grohl until the Foo Fighters. And still nobody even knows who the fuck Krist Novoselic is. So really the whole spectacle of Nirvana was Cobain being a giant douche.
I really wish Cobain hadn't killed himself. At least then Layne Staley would be the most important grunge singer to die. And all would be right in the world.
That being said, in utero is much better then Nevermind. Nowhere near as good as Superunkown, Ten, or Dirt, but I mean, not much really is.