I don't think people making fun of CoD is really a meme, it actually deserves a lot of the criticism it gets. The main criticism I see is that every game since Black Ops has been essentially the same and has used what appears to be the exact same graphics engine. I own Black Ops and really enjoyed it, but that's because I hadn't played any of the CoD games since CoD 2 so I didn't mind playing something that was the same as something else which I had never seen.
To give you an idea of just how rehashed these games are, I sat down and watched a friend of mine play MW3 for an honest two hours before he told me it was not, in fact, Black Ops and I had NO idea up until that point...and I've played hundreds upon hundreds of hours of Black Ops.
Now, I don't agree with people saying the games are absolutely terrible. The several Call of Duty games I've played have all had much better single player campaigns than any of the Battlefield games and I enjoy their unique storytelling.