I would agree with the assessment that he hasn't reached his full genetic potential if that's him in the avatar. He's cut but definitely not as thick in the chest, shoulders, or arms as his frame would suggest he could be.
I also would like to know what someone that looks so young is on HRT ???
And finally... Building up a tolerance to test is a fact of life for people that try to cycle on it for too long, requiring higher and higher dosages to achieve the same results. So if you're on a test HRT regimine ALL THE TIME, how could you expect to NOT start developing a receptor tolerance for test ???
If you want to cycle and you HAVE to be on test HRT, then you should just be cycling on gear that isn't test based.