You can go online and get a few recipes and then order your shop online and have it delivered. Time shouldn't really be an excuse, it's just as quick and easy to eat a salad as a pizza.
Time is only one factor, money is another. For example, most people agree fish is good in a diet. A lot of people think fish is too fussy though. The simplest way to buy fish for home cooking is a fish pie mix. I use it for spicy fish stews. Our Morrisons sell it at £11.99 per Kg and I'd hate to think of the state it would be in if I had it delivered. Our local fish wholesaler sell excellent quality fish mixes at £5.99 per Kg, all large pieces of salmon, cod, smoked haddock, and some sort of flat fish. Whilst there, I'll also get vietnamese king prawns and atlantic shrimps, both very much cheaper than the supermarket. Their opening hours are 5am til 12.30pm though and they don't deliver.
They also sell things like frozen duck breasts, a pack of 2 cost £3.20. In the supermarket they cost something like £7.50. A local farm shop does 5lb packs of chicken fillets for £12.00. Again the supermarket is double that. On saturday I'll go to Malton market and get fillet steak at £21 per Kg. The supermarkets are around £40 per kg. In all cases, the supermarket quality is inferior as well as being more expensive. There's a guy from Crete at this market who sells large olives that he imports from his hometown. You'd never eat a supermarket olive again if you'd tasted his.
But, few people have the time to shop around. When people can, they get better quality at lower prices.
However, if Lidl has it's wild boar or diced vension on offer again, get some for the freezer. That is just as good and cheaper than our local deer farm shop.