There are millions of books, no need to waste your time on a bad one. I go by my gut; if someone I know recommended it I'll stick it out longer. If it has lots of praise or I like the author I may read several chapters hoping it gets better.
I have no qualms quitting in chapter 1. I started Life of Pi and quit like 10 pages in because the main character is insufferable. I quit Dear Miss Metropolitan because I didn't like the style of narration; the story sounds great but I don't enjoy reading it so I move on.
Conversely, I've stuck it out with books that weren't what I expected but still were interesting. Song of Achilles was one of those; it turned out to be a gay bodice ripper but by the time I found that out I was already interested in the storyline and wanted to see it through.