So yes, all of these things have happened to me. My solution was to just start making things that have minimal steps. Essentially, just a handful of ingredients thrown into a pot and mixed together.
My favourites are: Stuffed peppers (I often just make the filling and have it as a side dish but it can also be a full meal), potato and chickpea salad, and chili. Chili does have a lot of ingredients but it’s a simple process. If you haven’t yet, organize your kitchen and keep things like breakfast foods/ingredients separate from lunch and dinner food/ingredients. I found that helped me a lot. Also, I’ve got a blog with other hacks, I’m a coach and I have ADHD+ASD, so everything is coming from first hand experience.