That's only my opinion. So don't pay attention.
The animation is good (as always) but you can see that a lot of people on youtube and some reviewers here (like me) are not very glad with your work. You might find it funny but in fact it's very offensive (in so many ways that you can't even imagine). You may understand me when you'll see some episodes of South Park or Sealab 2021 where you can see stereotype representation of people from your country.
And I also find the song very annoying and the rhythm kind of dull - that is something unexpected from you.
That's actually makes me upset because I like your other works and I'm fan of your animation..