I'm in a different situation to you - I don't like planning meals - but my solutions might be helpful to you.
I like having a set of meals and allowing people to pick from those on weekdays. There are a number of things you can do from only canned and frozen items, which means that you can make those menu items available for nearly all meals without needimlng to worry about when the food will be eaten. Before mealtime, I pick the ones I want to eat and then let the other people select from those items.
The big advantage is that you can sorta plan the meals in advance without having to get other people to commit to anything.
I find it a lot easier to give/take supplements than change diet. Obviously, I try to eat healthily, but if someone's picky giving them a gummy vitamin is the option with the least headache on your part.
Yeah, uh, that is what happens when you go to war with a major country.