The new ingredients are typically abysmal for your health by comparison. Good luck finding a chip not fried in safflower or sunflower oil in 2023. Seriously, go try right now. I am not a seed oil guy, but the statistical prevalence of these oils might have some impact on public health and the fact that no alternatives appear to exist (outside of boutique settings) does kill off some of my bullshit canaries.
Food companies can't screw with the raw ingredients too much. It's a challenge to find certain things like actual chicken broth and sometimes I wonder if the onions are getting weaker, but you can more or less maintain the same quality you'd expect if you cook your own food.
If you are time-sensitive, then cook more at a once to amortize your time investment. Your freezer isn't just for holding the crap that comes frozen at the grocery store. You can accumulate weeks worth of high-quality DIY rations with proper discipline. Think about how big a pot you could actually put on your stove. How many cubic feet is your oven? Do you have the ability to run a propane burner outside? You can make a month's worth of lunch in 3 hours. Think about the economics of that at scale. Sure, you would spend a solid week cooking, but then you would have several amazing meal options to choose from for an entire financial quarter.
Every now and then I'll sample a bit of trash like Oreos or Cheezits at someone else's house, but every time I decide I never want to buy these products again. If I really get a strong hankering for some cheezits, I'll bake my own. That's also how I keep myself in check on fitness - If I don't want to cook it, then I am not going to eat it.