look, I have been in almost the exact same boat, I had 5 years of feeling worse and worse, then sought treatment and had to fight my way through 8 doctors and 16+ blood tests over two+ years to get where I am at.... and you know what?? It can get better IF you find the root of your problem and address it.
most doctors are egomaniacs and idiots to boot. Doctors saying things are normal and your tests being IDEAL are two completely different things. Normal = within the range of 95% of the population including 90 year old men and women on their deathbeds... sure you're results are "normal" just like them... and guess what, you feel just like them too.... is that IDEAL?? no way.
saying "these are my cards" is the same as accepting the fact that you will be miserable for the rest of your life. why would you do that? you don't get another chance.
You have been on a littany of TRT drugs - doesn't that show you that your libido is not solely Testosterone related? If it was, you would be feeling better. Some people are lucky and can treat just one thing and feel better. Some (lke me) are more complex and require multiple system fixes to get things working right.
Most doctors are terrible at TRT - was your doctor tracking and treating your Estradiol levels?
Thyroid and Cortisol are known to have major interactions with your hormone balance, mood, energy, libido, etc. Ignoring them or labeling them as obsure tests won't really help you - actually it will keep you exactly where you are today - miserable. The tests I listed are all known to have major impacts on hormones, health, system balance, etc. recommended by the few great doctors I could find.
the system beats you down, doctors beat you down, insurance beats you down, your mood beats you down, your body beats you down.... and you can decide to fight it and push to have the best life possible (i.e. - get the right doctor, the right tests, and the right treatment plan) or you can just give up and let you're one and only life pass you by.
was it hard at times? you better believe it. I was a basketcase at times, got close to being fired because I was only at 25% capacity when I am use to working at 200%, had major issues with my loving wife, no energy to spend time with my kids, it was horrible.... but I am on a good treatment plan (because of all of those irrelevant tests as you call them).
I got through it because I had faith that God had a plan and purpose for my life, and that being miserable wasn't it. Hopefully, I can help others not give up and see things through to the end.
I truly wish you the best.