Yes there may well be a link to what you eat and how you feel, OP.
You said no dependents but you have pets. Who would look after them if you were incapacitated?
Sadly a relative of mine died pretty young due to poor diet. Liver cirrhosis. Everyone assumed it was booze but it was actually sugar and fat - they barely drank. Wasn't morbidly obese either.
I understand that lack of control about food. I've been there. It's a tough one to break out of. It's not about food really, but about a void you're trying to fill with food. Have you had counselling?
I wonder if weight loss injections could help you as they suppress appetite so could help you break the binge cycle but you need solid medical advice if course.
I'll only give one piece of advice about what to eat and that is, having no protein at breakfast causes me problems the rest of the day. If I eat cereal or jam on toast i'll crave carbs all day long and be ravenous.
Now I have eggs or a big bowl of proper, really thick greek yoghurt, berries (get them out the freezer the night before), and nuts or nut butter. Takes v little time and prep, fills me up, tastes great, and helps to prevent cravings.
Good luck xx