If you are eating that every day then you are destroying the beauty of food for yourself. That level of food should be a treat, not your "daily driver"

Pretty common for me, but I've mostly lived in places with a huge variety of fresh ingredients. That "level of food" is actually not that high in places like Barcelona, Lisbon, Sao Paulo, Sydney, SF, LA, Guangzhou, Bangkok, etc. 60USD/day (~1300USD per month) is not that much compared to how much FAANG employees are making. At the end of the day it's a matter of priority. Tons of people spend more than that on alcohol/cigarette/drugs/cars.

Per person, yes. You'll have to cook it yourself though.

You'll be able to make it healthier though, and tune it exactly to what you like.

I think so. I buy bulk (15-50lb bags) organic grains, legumes, flour, seeds. Makes it more work to calculate per meal but it's pretty cheap. I get a lot of verity but you do have to be creative and it helps if you are fast at cooking.