ADHD

If you lose motivation because of the amount of time that you'd spend cooking, you should consider using days off to prep building blocks that can be used for different meals. Keeping the initial cook simple can give you a broad canvas to change things up on the spot so that you don't get fatigued over the flavor. You can salt a large chunk of meat like a pork shoulder or chuck roast and use a long cooking method like a braise or a roast. The longer cook times will make these cuts extremely tender, and you'll only have to do it once. Use them throughout the week in whatever application you feel like on the day, even if that means just adding it to your ramen. Since it's just salted, it's versatile enough to adapt to whatever seasonings or sauces you add to it. If you're using store bought ingredients, you can put together pasta, bbq sandwiches, or quesadillas pretty quickly.

As far as vegetables go, you can also prep individual portions of things like a mirepoix a week ahead of time, to cut down on the work you have to do every day. You could even freeze it in ice cube trays to make them last longer if you have the space. You can mince garlic ahead of time and store it in a neutral oil. If you don't mind acidity, pickling and lacto fermenting your vegetables is a good way to both preserve them and have something that's ready to go on demand. Some vegetables like broccoli can be parcooked without sacrificing texture to reduce the amount of time you have to spend cooking on the day of.

Meal kits may not have worked for you because they simplify the shopping, not the actual cooking process. It still takes the same amount of time to cook a meal kit, which doesn't exactly help when you're hungry and exhausted. I think that prepping pieces of a meal in advance will give you the tools to throw something together almost as quickly and easily as ramen, which might lead to you cooking more often. I hope this helps, and I'd be happy to expand on anything that was vague or otherwise lacking!