My dad passed away 3 years ago. It wasn't a quick process either. He had Parkinsons and slowly deteriorated for 10 years. That was the hardest part.
Then one day he stood up out of his chair at home and either had a stroke or whatever but passed out, smacked his forehead on the hardwood floor, had bleeding on the brain/stroke Wasn't sure if the fall caused it or it happened before. He recovered but was really never able to speak, have any emotion, anything. We all just slowly saw him die.
By the end of the 9 months of him being in either hospitals, assisted living, I had emotion but I already prepared myself and knew it was going to come sooner or later.
It's life, it sucks, and eventually you move on.