The main problem is that human evolution from chimpanzee-like ancestors to modern humans is very well-documented. I challenge anyone to go to this page, look at those skulls (reposted below), and tell me where a missing link should go. I certainly can’t see a good place for one, and that picture doesn’t even contain every fossil in our collections.
That’s not to say that we know everything about human evolution, there are a great number of things that we don’t know. But we do know what we looked like along the way, from Australopithecus africanus to Homo sapiens sapiens.
If you have some spare time, browse the rest of that article. It’s a fantastic summary of the evidence for evolution, and what better way is there to start off a new year than learning? I can’t think of many.
Have a good new year.