Don't worry! Mr. Obvious to the rescue!
In this meme, Grumpy Cat is grumpy because this meme should be using the “Y U No” meme template, but it is using the Grumpy Cat template instead. Grumpy Cat decides to bring the correct meme template and ask the creator (me) why I didn’t use the correct format.
Lol, I have a blog which is often read by younger kids and I put this meme on it, so I had to put this explanation there too. What a coincidence it came in useful here, too! Lol.