I saw this study and thought Id share it. Might be the reason why that despite my T levels have increased, my "anhedonia" (like the study calls it) has not vanished.
Testosterone prevents but not reverses anhedonia ... [Horm Behav. 2012] - PubMed - NCBI
"Testosterone prevents but not reverses anhedonia in middle-aged males and lacks an effect on stress vulnerability in young adults."
It basically says that having Low T puts you at greater risk for depression/anhedonia. Which makes sense for me, when my symptoms started I was in the 300s. It goes on to say that adding testosterone does not go on to solve the problem. It only helps prevent the problem if it isnt there yet.