I refuse to pay the $$ for delivery. (and don't get me started on modern USA tipping). (Singles rarely have orders that qualify for 'free' delivery)
I do eat a lot of frozen (after cooking

) for my lunch. Frozen Pizza get
tweaks before going into the oven.
The Movie said it: "Anyone can cook"
I do simple (just don't expect Gourmet from me).
Some Much, is from mixes or kits (Leftover Ingredients is the issue).
Having a usable Kitchen (workspace) helps. Having a few job dedicated (basic Rice cooker, Bread maker) appliances helps. You load'em up and walk away till they beep/blink.
Oh! And another borrowed Movie line: Recipes, are mostly guidelines. I start there and 'Season / add stuff, to taste'
And Yes! Too many/much Leftovers is a big negative. (2 additional meals is tops for me).