I wouldn't go as far as hate, but certainly there are some big authors that I read loads, then it all got 'meh' as everything seemed to become samey and well-trodden.
So an authors like Stephen King, I read voraciously as a 11-14 year old, (King is YA right? Well, it was YA for me in the 1980's), but got tired of him after a good 8-10 of his bricks. But still got a soft spot for him, I suppose.
And Terry Pratchett. I think I've read the first 12 discworld, then I just drifted away. Needed something new to fuel the creativity.
Turning to SF, I think Iain M. Banks is great...but all his SF is essentially 'Culture', even the non-culture SF has the same feel, except perhaps for Feersum Enjinn. So I kinda lost interest after Excession. I've returned and filled in the blanks more-or-less and although I enjoyed them (well, one left) they just don't have the same impact on me like the first three Culture books.