Terry Good kind, first book was alright. 2nd garbage. Can't read any of his later books without feeling like I'm watching a rerun of a cheesy soap opera.
James Patterson. Vapid, corny, and mindless. Total popcorn fiction. Guy's obviously doing something right, being as popular as he is, but to me reading him is like choosing to watch public access cop procedurals when you could be watching True Detective or Breaking Bad instead. To each their own, I guess.
EL James - 50 shades of gray. Couldn’t make it through the first book. Ugg. Horrible. Even the best story in that writing style would be horrible. But with the bad story it was unbearable.
L Ron Hubbard, halfway through Battlefield Earth and I realized, the movie was better.
Dean Koontz. I was reading a lot of king at the time. It's the only non-fiction book i just gave up on.
Card after reading Empire. I still have a soft spot for the original trilogy but he was never that great of a writer and if there aren't even interesting ideas and just politically motivated drivel then what's the point?
Dickens. One day i'm going to give a tale of two cities one more chance, but goddamn was that some boring shit when i was a kid.
I don't because my tastes evolves over time. I used to not like Hemingwa, now I love his work. I used to seek out Ken Follett, but now am somewhat over it.
I never swear any of them off, at least indefinitely, because I know full well my opinion of a book is purely based on my present self.
The Da Vinci Code by Dan Brown. By the time I was done I was so fucking disappointed that Silas hadn't murdered them all.
Atlas Shrugged by Ayn Rand. I read the first couple chapters in high school and couldn't keep going it was so shitty.
I liked Chuck Palahniuk until Snuff. By that point I was old enough to realize what a joke he was.
Ayn Rand. Read Atlas Shrugged once upon a time and it is seriously some of the most poorly written garbage I've ever tried to read. At one point she gives up any real pretense of telling a story to shove her ideology down your throat under the guise of it being a radio broadcast. This section lasts for 50 fucking pages!
Stephanie Meyer. I forced myself to finish her first book. Reads worse than a junior high book report.
Thomas Mann. I read half of his huge novel Magic Mountain. Seems like a diary recounting mundane every day experiences that just rambles on and on. Only book I ever stopped half way and couldn't finish.
Steinbeck. Just isn't my cup of tea. I find his writing boring.
Ayn Rand. For some reason I was forced to read atlas shrugged when nobody else had too. She seemed like a pompous narcissistic ass in her writings. Was very glad when we parted ways.
Piers Anthony. I read Prostho Plus and it had a disturbing scene sexualizing an underage girl's body (the main female character was 26, but was being "de-aged" by technology). Googled to see if anyone else was as disturbed as I had been. Turns out, it's a major thing in his writing.
Jodi Piccult.Very emotionally exploitative
Dan Brown, Da Vinci Code. 'Nuff said.
Honorable mention: Dean R. Koontz. Every book's protagonist is a writer/former writer recovering from some sort of trauma who gets drawn into some sort of Scooby-Doo adventure. It took me three books to figure this out, so not quite as per OP's instructions.
Hemingway. I despise his writing, was forced to read A Farewell to Arms and will never read anything else by him.
Cormac "fuck punctuation" McCarthy
I wonder how many downvotes I'll get...