It's more like an anime opening song than Nirvana imo, like there's so much packed into it the song can barely contain itself.
Ditto, comparing it to Nirvana only makes it more apparent.
The vocals are drowned out and the warbling effect just doesn't work for me, if you listen to "Smells Like Teen Spirit" they have the composition of a garage band but the execution of an orchestra, when he's singing the instrumental music is stepped down and steps up again when they get to the rocking-out bits.
*listens to it again*
I still can't hear the lyrics, your instrumentals need to take turns and just stop from time to time because as Cherry Cola said it's like an Anime Opening, high energy and incessant.
And for fucksake get rid of that warbling nonsense, it would be 100% better without it.