This... was a self-help book. The tone is different than your typical self-help book - although not consistently - but realistically it's the same advice you can get from any number of other places. Manson talks about how he's not like other self-help gurus regularly while providing basically the same advice for basically the same outcomes. 

He does acknowledge this early in the book, but he still does it, so I'm not sure it's exactly excusable.

I think if he'd leaned harder into his idgaf presentation it actually might have been a better book. Grating, for sure, but the way he sort of gets flippant at times and super serious at others makes it hard to accept his advice as genuine. He claims one thing and then writes about the opposite. 

The audiobook was well narrated, actually close enough to Manson's tone and mannerisms (from what bits I've seen of him previously) that I second-guessed whether it wasn't Manson reading it a few times.

Overall... I dunno, it's good advice, I just wasn't into the presentation, and presentation is more than half the battle when it comes to this stuff.