Yes, testicular atrophy can cause this. So can thyroid, stress, and a million other things.
You may be shut down and need some HVG. You didn;t give a lot of in of but that's definitely too much dex. You may also not be converting the total T to Free T in which case use UNLEASHED. Proviron does this too but there seems to be a quick tolerance to Proviron. It doesn;t work well after a while if used for too long.
So you're saying used Unleashed on cycle? I thought it was only for PCT? I have a bottle ready to go if this is the case. Is there a good time? Just stick with the recommended dosage?