To get the point across: this is a skit, a parody. It's supposed to be senseless and wacky and I have no idea why it isn't tagged as such. Those kinds of shows are supposed to do that.
Even with this lack of story that people are so calling it out to be, there actually is more plot than there is in Teekyuu; that's saying something considering it has a multitude of sequels and that the show is heavily rushed and fast-paced and acts like it's on drugs. Ozmafia, however, actually does the plot decent enough for its type of anime, yet still falls behind with the rest.
Never compare this to psychological, even general comedy anime, because of course, it looks terrible compared to that. Judge it as a short parody and you'll actually understand that the show isn't that mediocre as so many people are saying from these ratings.
It's a weird way to introduce characters for 3 minutes, but that small ending screen is pretty nice. There's also extra content after the credits.
4 is a stable score where it should belong and the anime doesn't work well when watching all of the episodes together, so I'd suggest giving a break per episode if you want to try and enjoy it. If you want a good anime of this similarity, definitely watch Senyuu instead.
