If they've never heard of slayer that means they don't really listen to metal so of course they wouldn't know what to do with it. Metal is very hit or miss with non metal people. Even when talking about one specific band. I know plenty of people that have like a handful of metal songs in their playlists and it's usually just one song per band and they dislike all the other songs that they've heard from those bands.
Tried asking them what they like about the songs and stuff when they asked for recommandations but the conclusion is always the same. People's tastes are weird and make no sense.
Yeah. Butcher's other books don't have the same misogyny issues so it's usually agreed upon that it's a Harry Dresden issue and not a Butcher issue...
It's also very hard to verify this Lara Raith stuff online (or at least I haven't managed to find anything about it).. almost as if it's not such an open secret.
That plus the fact that Murphy and the ex-wife look nothing alike and Murphy dies 4 books and 7 years after the divorce, in a series of books in which everyone knows the main character has never been allowed to be happy and keeps reminding himself that a villain once cursed him to die alone...
Then there's Molly who got shut down by Harry pretty hard and there's been no more tension since that one scene, so... Yeah, pretty meh stuff.