Yes, but one could say that Nirvana was influenced by David Bowie, The Velvet Underground, and Iggy Pop.
So since they influenced Nirvana, who in turn influenced some really bad pop rock, it would seem as if Nirvana is not the root of your problem. If you really want to argue that, then you have to follow the line of who influenced who, which would probably wind up some town squire or baird that nobody has ever heard of.
Nine Inch Nails & Skinny Puppy influenced Evanescence, doesnt make me any less of a NIN or Puppy fan. Skinny Puppy(cEVIN kEY to be exact) even discovered Sarah McLaughlin.
But I never really enjoyed Nirvana myself, their cover of The Man Who Sold The World was honestly the best they ever did, and its a complete clusterfuck if you know the original.