These suggestions are very extreme: ban ingredients, use artificial sweeteners.

What about America means that you can’t just use less sugar and eat less sugar? Plenty of other countries don’t have this problem.

Plenty of countries have this problem. WHO recommends a "sugar tax", to decrease market viability of products that are high in added sugar.

https://apps.who.int/iris/handle/10665/260253

Whether artificial sweeteners are the answer is less clear, given lack of evidence that increased use of artificial sweeteners leads to reduced sugar consumption.

Sugar companies paying for studies on the dangers of fat were a great distraction. Nowadays high sugar content is ingrained in the culture. Some other countries are also increasing their sugar intake. Soda companies in particular drive this phenomenon.

If you're willing and able to make everything from scratch, nothing.

But if you're not, or can't... well. Simple lack of availability will be a major hurdle.

Because the US produces WAY too much corn. Like insane amounts of corn.

And to make use of all that production, they make sugar out of it. High-fructose corn syrup to be exact. And then they put it EVERYWHERE because it's so cheap - because of the overproduction.