Yes i have also thought about something being wrong with our androgen receptors, otherwise at least some substance would have had some effect at all and believe me i have tried almost everything available.
Also i am not sure but when i inject test or as currently trestolone acetate, i tend to gain muscle a bit faster (with training of course) , but without any increase in strength at all, but this could also be only in my head.
Copying here one of my responses from a thread over on PeakT regarding low SHBG, which is a topic of interest to me similar to post-finasteride syndrome...as these cases are always notoriously challenging.
"There is clearly more to the story than anyone fully comprehends until more research is dedicated to this area. Certain disease states, as noted, can contribute to a "secondary" low SHBG condition. You also allude to the possibility of a more "primary" low SHBG condition.
You may find the following interesting:
https://academic.oup.com/humrep/article-lookup/doi/10.1093/humrep/dem382
Although it is a study of PCOS in females, I have always thought it provided some very thought-provoking data on the genetic components (and variability) when it comes to SHBG and androgen receptors. The study discusses different SHBG alleles and different androgen receptor alleles, these are the genotypes - with certain combinations (in this case long SHBG allele and short AR allele) making the PHENOtype of PCOS more likely...thus pointing to a possible genetic or "fetal programming" as they postulate for developing PCOS. It wouldn't be much of a stretch to imagine the same variables at play for many low SHBG guys (in the absence of the contributing disease states)."
Another note - there are some interesting links with female PCOS/genetics as I've had several very low SHBG males with a family history of PCOS in female relatives. Further some of the discussion that board member "James" and I had:
"Premature androgenic alopecia and insulin resistance. Male equivalent of polycystic ovary syndrome
Starka L, Duskova M, Cermakova I, Vrbikova J, Hill M.
Institute of Endocrinology, Narodni 8, CZ 116 94 Prague 1, Czech Republic.
Another fascinating study of relevance is one of a man with no detectable SHBG due to a homozygous missense mutation. While the abstract offers little of interest to this discussion, the full case history is much more interesting (although, hard to find for free on the Internet.) As the abstract reveals, he presented with "muscle weakness, fatigue, and a low libido" although he was mostly normal with respect to sexual maturation (as are all of our "Internet" low SHBG cases.) His lack of SHBG caused HTPA suppression and hypogonadism. Testosterone replacement therapy failed to resolve his issues. Also not mentioned in the abstract is that he has a sister with the same condition. The key takeaway being that the complaints related to libido, fatigue and muscle weakness. More importantly, testosterone in the absence of SHBG did not restore libido or strength.
Link:
https://www.ncbi.nlm.nih.gov/pubmed/24937543
Many of the "presumed congenital" cases share the muscle weakness complaint, to the point of claiming to be completely unable to sustain or build noticable mass."