I work in a bookstore and can tell you this has been infuriating the last few years. Quality control in printing has just dropped to near zero in some cases. I think this is definitely a multi-sided issue, but largely comes from a massive rise in self publishing. Lots of vanity presses let you print whatever with minimal work put into it. I’ve seen people mistakenly order $30 books that are entirely made of copy-pasted Wikipedia articles. Accidentally ordering a series that has the same name as the one they’re reading, but is clearly a ripoff. People copying-pasting entire books and making unofficial listings for them on Amazon/etc. It’s gone so out of control that at my store we can’t even accept local author’s works because we don’t know what their quality will be since it varies so much. Don’t get me wrong, some of my favorite books have been self published. But the industry is definitely taking over with a “print whatever you want, don’t bother editing” system.