Transdermal patches (adhesive patches placed on the skin) may also be used to deliver a steady dose through the skin and into the bloodstream. Testosterone-containing creams and gels that are applied daily to the skin are also available, but absorption is inefficient (roughly 10%, varying between individuals) and these treatments tend to be more expensive. Individuals who are especially physically active and/or bathe often may not be good candidates, since the medication can be washed off and may take up to six hours to be fully absorbed. There is also the risk that an intimate partner or child may come in contact with the application site and inadvertently dose himself or herself; children and women are highly sensitive to testosterone and can suffer unintended masculinization and health effects, even from small doses. Injection is the most common method used by individuals administering AAS for non-medical purposes. 
It’s heart wrenching to hear stories like yours. To lend some insight, I have most of my patients on estrogen blockers as well. This is something that I find necessary even though we replace to the normal range only. We recommend against GHRP-6 and all growth hormone treatment, so I cant’ speak directly to that. His testosterone dose is higher than what I would start a patient at, but it’s not exorbitant. That, however, is only part of the picture. Proper dosing is dependent upon the observation of how a patient reacts to a dose over time. So, that dose could be entirely too high for him even though I would say it is on the spectrum of normal dosing in general.
Did you have blood work done before and after you used this product? Do you continue to use this product for life now or only for this one time?
As far as how T treatment works…It doesn’t matter what the dose of testosterone is……any exogenous testosterone WILL shut down your own natural production. Hormones operate on a feedback loop and your body always tries to level itself out. Once your body detects an increase in test it will shut down natural supply. Also it is very normal for your body to convert this test into DHT and estrogen. Will your estrogen levels climb too high from a small dose? For most people the answer is no. But I know for a fact that for some people yes.