If you're not 800-1000 ng/dl and injecting yourself regularly, you are doing it wrong and need to find a new doctor.
If you're not a doctor, don't give medical advice on HN. (Actually, don't do it even if you are a doctor, as you don't have access to the poster's medical history.)
Edit: this post was made before OP edited in their disclaimer.
The really bad ones are either dosages which are just high enough to shut down one’s natural production but not high enough to replace it, or infrequent dosages (weekly or less) which cause a brief spike of healthy T levels and then a long trough of being too low. Some patients don’t respond well to creams or topical treatments, either.
I suggested a subjective target physiological result with absolutely no specific means to get there beyond "find a doctor."
If I believe someone is being mistreated by his doctor, am I not allowed to suggest finding a new one? What if his current doctor wanted to perform a lobotomy?
"Find a new doctor" is not "medical advice" as much as you would like to conflate.