Beloved question

Hi. Wondering ... how far into a book should one go, how many pages for example, before giving up on a book one is not enjoying ? I've gotten as far as 2/3s of the way through some critically acclaimed books before finally giving up and not finishing. I gave them a full effort because they were so lauded, celebrated, esteemed. But was not enjoying them at all and couldn't understand why so many others loved them. I could name a number of these books but do not wish to diss well known and love books.


Thoughts ?