The first segment demonstrates how poor the series and its parodic references have become. In the episodes we all remember, they used the same tense music that was used in movies, or even surpassed it. Now it's subpar because the current writers and/or directors in charge have no idea how things were done in the program in the past. The characters are empty, their emotions are always flat, they don't react to events as you would expect. They always have the same silly smile on their faces, whether it's Homer dying, Maggie being possessed by the devil, or Grandpa saying something silly. And that's it, there are no human reactions at any moment. Everything is done in a hurry, without the formula from the golden age that made you feel the episodes.
So you'll remember episodes like "Life On The Fast Lane" and how it ended, other episodes that moved the audience. And of course, seeing that all of that in the end only served as a basis to create empty dispose of material like this is not very pleasant to watch.
The second segment is the only one that passes. I have no issues with it except for the fact that the characters are devoid of the personality dimensions they had in the golden age of the show. Now they're just stereotypes, nothing more. But that's the case with all the modern ones, right?
The third segment is the worst, just watch it and you'll understand why. You can't create fiction that discomforts people in that way because it's torture, not fiction.