But to get back to books
....
So many that have been mentioned on here that I agree with:
Hated A Little Life so much. Only finished it because my daughter had insisted I read it and we normally have similar tastes. Thought it was bleak and depressing, and unbelievable.
(Conversely though I found A Fine Balance, which is a similarly bleak tale, gripping and memorable. In some ways it worked better for me because it uses characters as cyphers to reveal the atrocities and misery inflicted upon the people of India during the mid 1970's making the historical facts come to life. Not sure I'll ever read it again though - it's not an easy read.)
Also hated:
The Alchemist - dull and rambling. In this case The Emperor definitely has no clothes.
The Island - Read this on Crete staying opposite the Leper colony island of Spinalonga where it is set, and even this didn't save it! Shame really because the central conceit of using Spinalonga could have led to an outstanding novel, it's just this isn't it!
The Time Travellors Wife can't remember why I hated this - it wasn't the main character lusting over his wife to be when she was a child particularly, I think I just found it tedious.
I did think Birdsong was good though - more the war bits than the French set affair at the beginning.
Never Let Me Go irritated me, because of the narrators voice more than anything.
milkman I persevered with but it never really grabbed me.
Piranesi I quite liked, it was certainly atmospheric, but I was waiting for a clever ending to make sense of what had gone before and it didn't come so I was ultimately disappointed.