For most people it isn’t the ads, it’s the way ads are implemented. They harvest insane amounts of data to track and identify you. Then the ads in social media are inserted deceptively, or you get popups that deliberately make it difficult to dismiss them, or you’re trying to read an article but there’s an ad between evwry sentence. Most people would be ok with small, non deceptive ads that didn’t require you to sogn away your entire life to target them to you, but most ads these days are not that.