The rot goes deeper, it is not just the ads. There is a some sort of search engine incentive where recent content is favored over good content so all web sites just dump what feels like generated garbage all the time. It has gotten to the point where if I search and there is a timestamp within the last two years on the result. I know it's garbage and will not click on it.
The answer is probably going over to kagi where you are the customer not the product.
Honestly, not all web sites, there are still good ones out there but the search engines never direct me to them. It is always just slop all day long.