Me too.
For awhile I tried making the rounds of the specials, like Taco Tuesday at one of several Mexican joints, Prime Rib Thursday at a handful of pubs, etc. Got real boring after about 6 weeks. Now I’m back to random. Much happier.
Not really, but when I was a child, meals followed a predictable pattern:
Sunday: Roast beef, potatoes, veg.
Monday: Cold roast beef left over from Sunday, potatoes, veg.
Tuesday through Thursday: See Monday.
Friday: Beef stew made from what was left of last Sunday’s roast.
Saturday: McDonald’s, takeout pizza, or delivered Chinese.
There could be variations, as when Mom tried an “Italian spaghetti kit” by Kraft (cf. the Chef-Boy-Ar-Dee pizza kit referred to above), which was a hit, so it became a rare treat; or a can of Puritan chili con carne, which also became a rare treat. But for the most part, the above was it.
I was glad when I moved out and could have anything I wanted, on any night of the week.
For a while my mom took the monthly meal plan calendar from one of her magazines (Family Circle or Woman’s Day) and we followed that. I think it also provided a shopping list and recipes.
I don’t remember any of us ever having any input into what we ate for dinner.
I always dreaded 4 p.m. when retired husband would trudge downstairs and utter the chilling words “so, what’s for supper?” So, here is usual our rough guide.
Sunday: big breakfast early, big typical Sunday dinner (stew, roast something, spaghetti, chicken). Sandwich later if anyone was still hungry. Sunday used to be my big tv night, lol, I did not want to be disturbed after 7 p.m.!
Monday: leftovers from Sunday or Meatless Monday (veg lasagna, veg soup with grilled cheese, macaroni and cheese, nachos or pepper and cheese quesadillas.)
Tuesday: Taco Tuesday (including anything falling under the Mexican umbrella. Burritos, tacos, nachos…)
Wednesday: Weenie Wednesday (hot dogs mainly, but including anything sausage-y. Kielbasa, Italian sausage and peppers, breakfast sausage and eggs…)
Thursday: Wild Card! Everyone reached into the pantry and freezer, and without looking took two items. A can of beans and a can of tuna. A frozen package of ravioli and a frozen bag of fries. Whatever. Feel and grab. Everything was prepared as a buffet with bread or pasta or sauce as needed. If it was too ridiculous, it was make sandwiches or get fast food. (Seems not everyone liked sardines and frozen creamed onions, or a jar of pickled beets and a bag of frozen cherries!)
Friday: Fried fish (breaded haddock, or shrimp, or scallops, and fries, coleslaw, macaroni salad…). I don’t think they have Fish Coves outside of the northeast. If we lived elsewhere, I would have cooked whatever swam in the waters in the region.
Saturday: Pizza and wings, forever and ever, amen, no deviation. Even potato chips and a frozen pizza to watch the midnight Creature Feature on tv like we did when we were kids.
I have never seen the attraction personally. I mean the planning of the meal (as in thinking of something to cook with the ingredients available) is not the bit of cooking that takes time, and it’s the actually interesting bit IMO. Yeah we have loads of kids and are super busy, so we sometimes don’t have time to cook a proper dinner. But having a bit of paper saying “cook lasagna on Wednesday” wouldn’t help, we’d just be not eating lasagna or rather than not eating a generic dinner 
All meal plans do is take out the interesting bit of cooking and don’t really save much time.
I get I’m a very much a “fly by the seat of my pants” cook, and treat recipes as a general guidelines not a specific instructions. More “type A” people who like to follow the receipe to the letter, might feel differently.
Also I get there is a the problem of actually having enough ingredients, but we have a big family so we will also just get a shed load of everything (all the main ingredients we need to for the main dishes we cook, and a few other random ingredients that looked good/cheap). We rarely have the problem of stuff going bad before we cook it (all the meat goes in freezer anyway)
We had Sunday morning rolls from the bakery with bacon/sausages cooked by dad.
Sunday afternoon was mom making a big pot of tomato sauce, which got used that night and during the week.
Thursday dinner was always pizza.
Friday was going out to a restaurant, either the Italian or the Chinese place.
My wife also hates trying to plan a dinner, and if left up to her, we’d probably be eating a salad seven nights a week. When I retired I offered to take over the planning and cooking. It varies a little but it’s basically like this.
Sundays: Beef
Thursdays: She gets sushi, I eat whatever
Saturdays: Pizza
That leaves four days a week for some combination of pork, chicken, fish and anything-can-happen night (usually either meatloaf or macaroni with cut up hot dogs)
No, we do not. However, when I was a kid, my mom definitely had a weekly plan. Back then we were on a budget, some days were liver and somedays were split wieners with cheese.
Monday - AM Breakfast Sandwiches for the entire family.
Friday - Pizza for dinner.
I am working on others, but the above move the week along and at this point have become a good routine.
I love the idea of themes rather than a stock item, Mexican Tuesday sounds more fun than Taco Tuesday after a few weeks.