Did you forget the dozen or so Start Menu ads for random garbageware they started bundling with Windows 10? They didn't shy away from it either, you got all of that even in the Pro SKU.

Windows 10 isn't any less ad-ridden than 11. I remember it in all the OneDrive pushing, default browser resetting, lockscreen ad inserting 'glory'. Only after you manually stamped all of that out did it start being usable. But you can do that with 11 too. For now.