Man, unfortunately, it's just down to the user. But when my libido crashes, I look into 3 things. *Yes, it's simplistic, but we just do what we can, right?
Estrogen and it's evil metabolites
Progesterone/Prolactin
FSH/LH
Estrogen: you know about this. In the absence of bloodwork, I'd look here first. 2grams of Test is more than enough to get pretty estrogenic. AI's would help.
FSH/LH: Something about being shut down that just kills my libido regardless of high Test. HcG and Clomid help here. HcG for the balls, Clomid for the brain. But on a lot of test, I dont know how much help Clomid would offer.
Progesterone/Prolactin: The most often overlooked one, IMO. Unless people are using Progestins, they think they're clear of damage here. BUT, Androgen use affects the dopaminergic system in a bad way and lets Prolactin get out of whack. Even if PRL is ok, you can feel like crap, no drive (libido) if your response to Dopamine is blunted. This is true of Masteron, lots of Test and of course the mere thought of Progestins like Deca and Tren.
Prami, Cabaser, Bromocriptin helps with this.
If these dont work, for ME, it's time to take a break and let myself get back to normal for a while.
Blood work would be helpful for you to really see what's going on.
Good luck!