You have correctly stated the problem. Darwin thought that he would find your “emerging species”. They have not been found. The record is redundant with fully formed non-emerging species. I suggest those that are interested in Darwinain evolution read his 1859 book. The book contains no complex scientific language because it was written at a time when life science was in its infancy's. You might say the book is so simple that even a cave man could understand it. Now if you would like to discuss non-Darwinain evolution as related to genetics and biochem there exist evidence that is troubling to the theory of evolution.
And I suppose you will be as forthcoming detailing THESE supposed genetic problems for the theory as you have been about the fossil record? That is to say, NOT AT ALL.
Where did the hoofed and winged mammals come from? Where did the dinosaurs come from?
The evidence of their emergence from earlier species may not be complete enough or gradual enough for your satisfaction; but they do show that these species did not exist before a certain time. Where do you suppose they came from?
Do you think either the genetic record or the fossil record supports their emergence all at the same time and the same place? Perhaps some few thousand years ago?