Remember that being very lean and fit will tank your T as well. Been there done that. Been an athlete for the last 17 years. Had low T symptoms as well. Tested through Optimale and was around 12 nmol/L for TT and pretty much below range on the calculated FT. Decided to tick all boxes and try to raise it naturally so began eating in surplus and more freely, enjoying life, took some Boron, Zinc, etc, and done that for a couple months IIRC. Also increased my sleep as I was working few hours every night. Gained weight, pressed my NHS docs, showed them Optimales test result and they agreed to run their own blood test so saved some money. Result came back at sub 17 nmol/L for TT and barely in range calculated FT. So basically FT didn't increase. Obviously these levels were good for the NHS and sayonara. My libido was good, I was feeling good in all departments pretty much but had some bone/joint pain. Decided to run my own TRT to see if raising FT will give me some benefits. So 8 months down the line @ 100mg/week I tested top of the range TT at 29.2 nmol/L and calculated FT 0.62 nmol/L
I like the extra energy and aesthetics, muscles look better, gym is more fun, recovery still similar, but mind you I have other gut issues, so hard to judge yet. Libido pretty much the same. Feels like cognitive functions declined some, more anxiety as well. But all that can be from my gut issues so also too early to judge fully. So far still working on fixing everything and then will make a final decision to keep it or get off and enjoy my life naturally for another 10-20 years. And then look again as we will have a lot more data and real life results since we still pretty much in the dark with many TRT aspects FWIW.
So even with crashed FT I was feeling good, looking good and cool, calm and collected. But get down to very low %BF, stay there too long and you will feel like a piece of shit. Thats a fact, unless you still young and genetically gifted to thrive as some young guys I've seen. And remember that TRT is very individual and everyones milage will be different. My recommendations would be to eat up, put on some weight, relax, rest more, eat more good food, give some time and then see how you feel and if your symptoms get better.
Best of luck with whatever your decision will be.