Where do you order things online that you aren't inundated by ads?

Ad blocker. Even just putting https://12ft.io/ in front of your link gets you pretty far.

Ah, you mean the web version of https://en.wikipedia.org/wiki/Blinkers_(horse_tack) . I don't think that helps when you're stopped in your tracks by an upsell. Dominos won't let you order a pizza online until you've declined garlic bread, cinnamon rolls and a liter of pepsi three times. And you can't just click "pepperoni pizza near me", you have to build your pepperoni pizza, after putting in your zip code, selecting the store, carry out, then click build again, sure you don't want buffalo wings too?, ....

It's a lot LOT easier for me as an adult to ignore ads online than it is for my kids in brick and mortar stores to ignore the candy and toys placed at their eye level.