Okay. I am not saying you're wrong. I don't know where you live, and I don't know what the food prices are around you. I am speaking for myself when I say I have had a different experience.
Around me, a bag of Totino's Pizza Rolls is $5-6. That's 40 rolls, or about 20oz of food. I haven't checked single pizza prices so I can't speak to those except for what I see online (looks like $1-1.50 is the average). Those are about 10oz. Your Tina's burritos are 4oz each.
At ALDI, I can get a head of iceberg lettuce for $.69. Two tomatos for $.79. 3 onions for $.99. Less than three dollars, and I have a very hearty salad. It's $1.49 for a pound of edamame, which makes a good snack. Or $1.89 for a pound of sweet potato fries, if I wanted something a little heavier.
It would cost me $1.69 per pound of chicken breasts. So, about 1/3 the cost of a bag of pizza rolls if we are going by weight. Egg prices vary, but I would say $1.50 is a fair average. That is a little over one pound.
I already mentioned frozen vegetables and chicken quarters on the last page. Hopefully you see my experience has been different than yours.
Price is not an issue. Convenience is a slight issue, but even then it is a matter of a few minutes prep time.
There's more to health that just weight. For one thing, Ice Berg lettuce is a useless vegetable considering it has next to no nutrition compared to other things you could be using in your salad like Romaine or Spinach (which are considerably more expensive...). Edamame (Soy) contains something that's very similar to estrogen, which can lower Testosterone levels within Men, which has many effects including weight gain. And you're much better off purchasing raw Sweet Potatoes and cutting them up to make you're own fries then purchasing a bag of them, considering they're likely not additive free, which effects the nutrition of them considerably.