Do you have any evidence of this conspiracy? Perhaps it's just food producers adding an abundant, cheap sweetener to their crap because that's what the market demands?
Read the ingredients and buy or don't buy. People need to have a bit of personal accountability in these things.
But it takes a little time and a bit of care.
If you're stuck in traffic for time measured in hours, you're not baking fresh bread during the week.
Even the much-higher-end supermarkets near me don't have meaningful alternatives for a lot of products where I am, and I'm in a HCOL area.
If I were FDA dictator for a day, I'd requite a corn logo on anything with corn syrup, and crossed corn for anything with HFCS.
Now calorie inflation can be done with sugar, too - the real deal is to have things that aren't "diabetes inducing sweet".
I read the ingredients on everything (I'm a vegetarian) and I don't buy anything with corn syrup or added sugar that isn't either 1) a once-in-a-while treat or 2) something I'd add a bit of sweetener to if I were to make it myself.
I don't shop anywhere special.
Personal accountability can only go so far when you're shown ads for sugary cereals and candy every morning as a kid.
Contrast that with, say, the current marijuana market in my region. It's regulated, it's only available at a relatively high price from licensed dispensaries. There are billboards but not much in the way of TV or radio ads. It's not marketed to kids. If you get addicted to marijuana in the Lower Midwestern US, that's a lack of personal accountability because you can't point to all of the stuff that's used to make junk food popular and say "they got me addicted!".
The same thing is true for junk food. People eat it because it tastes good. How much food should be regulated is up for debate but there's something irritating about this reflex to blame every problem on some shadowy cabal of rich people.