Is this story fair?

I am currently reading the book 12/22/63 by Stephen King. I personally don't feel that the story is fair because I feel like the universe is against the main character and there is no way of controlling the universe. The universe is against the main character because the main character is trying to change the past, and the past doesn't want to be changed. My main character prevented a murder of a family, a serious injury that could've handicapped someone for life, and is trying to save President John F. Kennedy. The main character keeps getting hit with obstacles and I can tell he is exhausted from all the work that he's putting into to save Kennedy. Also, the main character is attached to emotional strings in the past, so when he has to go back to the present, it will be a lot harder for him to let go. Also he has to lie to the people  he loves because he can't tell them that he is from the future.