"what we know" - that's the problem here because you seem to think you know all manner of things none of us yet know.
Example, you insist that something as complex as the first living entity cannot have emerged by natural processes but we do not know that is the case. Much better to be patient and wait for new discoveries in the field.
It is not the absence that you are confronted with; it is knowing that what we know can build a complex, specified, integrated system in the mind. That absence of evidence is simply you searching for something that is not there.