cosmology - Why does the early universe look so big in a telescope?

As we look into the Deep Field, we see the Hubble photos of early galaxies up to only $400$ millions years old:

Wikipedia: List of the most distant astronomical objects

Because there is no center of the universe expansion, we can look for early galaxies anywhere in the sky. The earliest galaxies appear to us as the most distant in every direction. Therefore the early universe appears from our viewpoint as the most distant and thus the largest sphere with the radius, as we see it, of $13.4$ billion light-years (based on the most distant object in the above Wikipedia link).

Oversimplifying the spacetime geometry for a moment, the circumference of the early universe appears to us as $84$ billion light years ($2\pi\cdot 13.4 $) at the age of only $400$ million years. Clearly this calculation is incorrect. Obviously the universe was much smaller. However, we can see numerous galaxies along this circumference of our viewpoint. So either the distances we see between the early galaxies are much smaller than they appear to us in the sky or else the early universe looks way too big for its age.

What is the logical explanation of this illusion?

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EDIT

Since this question is misinterpreted and misguidedly closed, I have reposted it here:

Is the universe a giant telescope?