I remember the summer when I started and then joyously DID NOT FINISH not one, but two books. It was 1969 and I had just graduated from college.
One of the books was Rabbit, Run by John Updike. The other was The Hobbit. I was not enjoying the books. I still remember the joy I felt when I realized that these books were not assigned to me to read for a class. I wasn't going to be tested on the contents. I didn't have to account to anyone else for abandoning them.
What a sense of freedom I felt when I realized I could just stop doing what I was not enjoying!
I haven't done this a lot. I read the first chapter of the very first book in the Harry Potter series. That's all it took: I was done!