Everything you mentioned, PLUS:

• Increase in stress, leading to "grazing" eating
• increase in corn subsidizes that make HFCS cheaper to add than honey or even sugar
• the campaign against Fat as a flavor enhancer, which pushes companies towards sugar in the first place. Fat, for the most part, passes through you whereas sugar is metabolized
• decrease in walkable cities, or even walking trails. Combined with people having less time to use them.
• unfettered algorithm that prioritizes engagement to keep people in front of their screens, this less physically active

The list goes on.

The single most important thing everyone can do is take a walk. I make sure I do this rain or shine, even if it's down the block and back.

GLP-1 and other "weight lost methods" gain popularity in the US due to our population's proclivity of saying "I want x, but I don't want to change anything about me." In other words, "I want to lose weight but don't want to change my lifestyle."

Study after study has shown that slow, gradual, and intentional weight loss is healthier and will last longer than any fad, drug, or food plan.

Not only will your body naturally learn what it means to eat and be healthy, you'll actually feel better too.