Unoriginal
Just an unclever old rehash of something that everyone all ready knows with nothing new or interesting to make it worth while.
Also I dont think people are truely criticizing the animation, they're just explaining (perhaps a bit bluntly) why they gave it such a low score. What I mean is if I watch a flash and dont particularly like it, but I can tell the artist put alot of time and work in the animation I'll still give him a decent score. So what I think most people are trying to say is "I didnt find anything in this that deserved a descent score" not "the animation sucked so I gave it a bad score".