I think I know where you're coming from. I recently reached saturation point with all the conflicting science about food and diet. I'd made mistakes off the back of "science", so I decided that the safest option was to aim for a 33:33:33 macro split, eliminating stuff that I am pretty sure is bad for me (gluten, soya, veg oils). I figured at least if I aim for moderation I've got the least chance of damaging myself, ha.
After a few weeks though I started to count my macros and I realised that I had naturally gravitated towards a higher carb diet (apart from when I'm eating a lot of Greek yogurt :P).
I know you've got a thyroid condition and there is a set of advice that goes with that, but personally I think that stressing about your macros is probably more damaging that what you eat. I would aim for moderation and see where you naturally gravitate to.
"I think the basic anti-aging diet is also the best diet for prevention and treatment of diabetes, scleroderma, and the various "connective tissue diseases." This would emphasize high protein, low unsaturated fats, low iron, and high antioxidant consumption, with a moderate or low starch consumption.
In practice, this means that a major part of the diet should be milk, cheese, eggs, shellfish, fruits and coconut oil, with vitamin E and salt as the safest supplements."
- Ray Peat