Funny you mention this, lately I have had a hunch that carbs could be something to eliminate from my diet. I havent been able to do it 100%, but I have kind of a checklist of things in my mind of ways and habits to change. Eating carbs is on there. I may give it a closer look

The keto diet is pretty forgiving. I did it for 2 weeks and aside from missing snacking and being annoyed that I had to check the carbs on everything (apples have a ton of carbs apparently-- who knew?) it was easy. All my normal meals are frying some meat in oil, plus steamed or fried veggies, plus a carb like noodles or rice. I just stopped making the carb and went heavy on the olive oil and voila. I didn't notice too much difference, energy-wise, as in I didn't notice that I became a different person full of energy like I see in some positive testimonials. So I haven't continued it. But those first few days after I went back to eating carbs I sure did notice the hit to my energy in the hours after eating them.

Mid 30s, When I started going to ~one meal a day (dinner), my sleep was better and I didn’t have the afternoon digestive tiredness.

I only have coffee for breakfast (black, dairy doesn’t feel great to me first thing), keep hydrated, if I eat a huge dinner (large salad,carbs,protein,fruit) it’s amazing how it lasts 24 hrs.

I do not go to the gym though (not sure if my eating habits would be compatible with being a gym goer, I do walk a few miles a day though).

I notice this a lot. But what can you do? I don’t want to go full keto.

You don't have to go full keto, and I don't. Just be cognizant as you eat that hamburger at lunch time that this is directly going to cause me to feel lethargic and bad for awhile this afternoon. If you still eat it, that's fair. Just being aware of the tradeoff was a step forward for me though.