If sites make it clear, i stay out or pursue alternatives they offer. For example i don't use bild.de. And for other sites i've started contributing to payment schemes like Patreon. Mobile apps i often by the upgrade to remove ads, even though i can just block them altogether.
That's good for you! The truth is that most people don't do that at all. I feel that either we need to pay for content or ad companies need to sponsor us for the content. If some sites have terrible ads it's really not that hard to just not go there.
I think that'll come over time. Right now the problem is that the "value" of a page view is far below a single dollar, and paying so little in a way that isn't negated by the costs is very hard to solve still. At the same time full-on subscriptions often don't make sense if you're just gonna look at a certain site a handful of times per year.
Patreon is a big step towards fixing that, since it allows me to pay small amounts to people whose work i enjoy very occasionally. It is however not the end game yet, and i think if that path is pursued further, ads can become a part of the past.
Also the "just don't go there" thing is hard to do in reality. If only because to find out that a site is bad, you need to first go there. Then there's the cost of remembering in the future that the site is bad. Then there's the social cost of getting linked to a thing. etc. etc. etc.
