Given that your dad has just passed, Up must have been very brutal to watch. No wonder that the film is one of your least favorite movies of all time. Completely understandable. If I was in the same circumstances, my opinion of the movie would have been different. Pixar also has a way of tugging at emotional moments when you least expect it. Without giving any spoilers for Inside Out, I'd say that the story is not on the level of Up as far as the death theme is concerned; it does deal with loss in terms of the tumult of emotions a child faces when transitioning from childhood to pre-teen. So there is an added poignancy to the story.
