Being on TRT is much healthier than having very low test. Emotionally, metabolically and cardiovascularly.
Proper TRT is the lowest dose to get the highest results. Using 300mg or so while not taking relevant supps, giving blood or monitoring your health is not good. 100mg or 150mg is a good dose weekly.
But TRT is not to treat anything but very low test. Try a restart or clomid protocol before thinking TRT.