At your age, one can assume age related issues and not get too carried away in trying to ID and fix a cause.
The best overall measure of your thyroid function is to check your oral body temperature when you first wake up AND mid-afternoon. Best to be around 97.7 when you wake up, 97.3 and lower a a problem. You need to hit 98.6 in the afternoon. If temps low, read the thyroid basics sticky.
You need to be using iodized salt and should have a long history of that. Ditto for your wife/GF.
Have you read the advice for new guys sticky?
TT looks OK, but we are really interested in FT. FT lab work [low] looks not so horrible, but FT levels change a lot and we thus do not know your overall FT status. E2 is low, suggesting that FT is lower. TT can be exaggerated in older guys as increasing SHBG levels lead to more SHBG+T that exaggerates TT which can easily mis-lead most doctors. LH is also released in pulses and has a short half life. FSH is a better measure of LH than LH itself. With lower E2 we do not expect that SHBG is high. But if the liver is not functioning well, the clearance rate for SHBG+T can be reduced, and again TT levels are exaggerated. AST/ALT seem elevated, but sore muscles from the gym can easily do that.
You will not find an ethical main-stream doctor who will do anything with your current TT. Need LH/FSH.