"I hate to break it to you, but I consider Nickelback to be considerably better sounding than Nirvana. I never did understand why hearing someone mumble around a mouthful of marbles while the band cranked the distortion to hide their lack of skill was so popular..."
That's fine, and regarding Nickelback, you're perfectly entitled to your musical opinion, but to claim that Nirvana had no skill is doing a bit of disservice to their and Kurts' songwriting ability.
I'll just leave these videos here so you can educate yourself a bit more regarding the songwriting stuff - these are from Rick Beato, a reasonably respected musician and producer in his own right but also an academic and analyser of songwriting construction and music theory, taken from his series "What Makes This Song Great".
Episode 90 - Smells Like Teen Spirit, from Nevermind
However, I expect that you won't watch these videos because you already have an opinion formed regarding Nirvana.
You could however prove me wrong, if you feel like it?