There's an interview with Dan schmachtenberger where he talks about the worst book ever written (his opinion is that it's 'the 48 laws of power'). He made the point that being consistently wrong is actually pretty impressive, and there are worthwhile lessons from watching someone getting taken seriously despite being wrong. Maybe you could revisit them with that approach.
Actually, it's both. I wanted to study media theory, and it was interesting that his work both appeared in compilers and philosophy, so I thought, “Let’s buy some books and dig into them.” The content was stupid, but I didn't need to throw the books away. After writing that comment here, I actually went and sent all of them to paper recycling...
