honestly after reading the first few lines i think we should just go through with the varicocele surgery. it is mild, has maximum 1 month recovery, and if it "unblocks" testosterone that's a bonus.
gotu kola is more established in the context of anxiety than OCD, and even there its effect may be a weak effect. I find just as much as it puts you in the present it makes you drowsy or spaced out; not sure if it is varying levels of asiaticoside or just my response.
i dont see any liabilities adding it now, but perhaps down the road when you add even more. I would also consider hanging question marks on resveratrol, glucosmaine, GSE, GPC, taurine and forskolin. Why add something that doesnt make a clear or unique addition?
i would advise ginger for volume of the testes and total T levels [1][2], it also has the interesting effect of alleviating anxiety. There are other things i'm sure you could deliberate on and throw at it as well: ginseng, maca, zinc, boron, tribulus, and more.
as for the OCD, i think inositol[1] is an interesting one. Probably safer than St Johns and more effective than Gotu kola. Inositol intake can also be manipulated to a significant degree by small changes in diet. I would assume, like depression, that OCD is caused partly by low serotonin; things like magnesium, green tea, and zinc might be expected to help.
regrettably we have exhausted many of the low-hanging fruits. We may have to revisit old ideas, try more potent and more unique natural extracts, combined with new approaches in the lab