Dear S_C_P,
Personally, I have no qualms with the tempo of the Chopin. The problem is that what is foremost in your mind is to remain slow, and in the process, you become slower and slower and forget where the music leads and what it says.
Although you choose a slow basic tempo, there should still be a forward movement in each phrase. At the moment, the pulse is unsteady, and we lose track of what you intend to say, because the forward movement and "backward movement" are not arranged in any logical manner.
An extremely slow tempo is very difficult to effectively achieve, whereas an extremely fast one requires simply some fleet fingers. Perhaps for now, while studying the piece and attempting to construct something clear, coherent, and therefore touching to the listener, we might stay away from the extremes?
Even with the intent of a slow-er tempo, I believe that it would be a profitable exercise to practice each phrase a little faster than your eventual tempo, just to find where the phrase leads - then duplicate this in your intended tempo. No matter what the tempo is, the ideas must remain connected, lead to a point, and therefore, say something to the listener.
Very best wishes,
Jean-Baptiste Morel