The web is far too large, and far too commercial -- adtech have forced commerce into fucking everything, and fucking ruined it. Without ads, a lot of things hundreds of millions of people use wouldn't go away, they'd reduce to a more sustainable number of companies and products. The remaining products and services would have to work harder to be better to compete and attract custom. Your new startup might have to offer a genuine improvement or innovation to get traction...

As an example every single Amazon or web product or service search results in dozens to thousands of irrelevant, shoddy and worthless products and services that are far closer to an outright scam than something to use. That's without considering the vast array of true scams and fakes.

A web without ads would have a chance of being useful once again, rather than every single click being an opportunity to part me from more money. Perhaps with suitable heavy regulation we could have the best of both worlds, more like newspaper advertising of old. Just "enough" non-invasive, non-tracking, non-JS ads to provide information on new services and products, but with enough demands of honesty, escrow good behaviour deposits, or whatever constraints you can conceive to keep all advertisers well behaved.