I had a decent idea. Not that it's easily practical, but it's more practical than other solutions.
Major problem today is information asymmetry. Google giving you free YouTube videos is front and center. Google paying for it by linking your location and this and that fingerprint from here and there is hidden in whitewashed language 3 settings menus deep. Many things are hidden in bottom right of a billboard in fine print, t&c fine prints, etc,.
What I propose is the law making sure that all information about the product that you intend to or are forced to by regulation to make public, public in the same measure. That is, if you're going to advertise "coca cola, open happiness" you also need to have in the same fontsize "39g of sugar" right next to it. Similarly google search bar needs to say what info of yours helped serve the ads you see, right next to the content paid for by those ads.
If you're going to hide less palatable stuff in your t&c, then marketing logos slogans all become illegal for you. And all information even positive ones must also be in fontsize8 t&c fine print.
Real estate ads can't put *artists impression at the bottom right of their ad in fine print, it has to be as big as the main tagline.
You get the idea. What I gave are just examples, slight variations of the idea that still focus on information symmetry as the main goal, will also work.