This is one of my favorite episodes from Season 2, perhaps because Season 2 was an overall let down. That being said, this episode was hilarious and wacky. Is the animation groundbreaking? No, but I think it's the right medium as it just makes all the character's actions more entertaining. Yes there isn't much of a story, because new flash there isn't supposed to be. It's old people in a retirement home fighting back against their sentient technology. That's it. Nothing more, nothing less.
I do not understand the hate just like I do not understand how people call this a 10/10 masterpiece (because it's not). Learn to stop reading into comedy and just enjoy it for what it is.