I would expect if this were real life, this would be a documentary. Living beings with the frailties, problems, ego's, and learned social traits (good and bad) that we all have to deal with on a day to day basis in our existences in this universe.
Life isn't straightforward, nor is it all seriousness or all comedy, it's a bit of everything.
I would expect that Seth MacFarlane would be a Nobel prize winning psychologist and sociologist if he weren't a comedy creator. His understanding of all the different types of people, their frailties, problems, prejudices, and ego's is exceptional beyond description.
This may possibly be the one piece of cinematic entertainment that is more of a documentary of the lives, mentalities, and emotions of humans on this planet, than it is a comedy.
You cannot rate something like this. It says too much about our world, our civilization, and our peoples.........it is shallow and deep at the same time. It is beyond any rating system we currently have.
I hope, when the day comes, this man leaves his brain to science.