Adtech is a joke. Even targeted ads are so irrelevant to the point where I don't think most people can tell if they're random or not. Except when the creepiness kicks in, because they show you ads for this one thing you googled a week ago.
Google can't get it right. Their ads suck, and their Youtube suggestions aren't much better. Amazon can't get suggestions right in their own store.
The whole ad industry is a joke. Most people I know do not watch TV anymore, not because of the content, but because of ads. I enjoy reading magazines, but I don't bother anymore because they got full of ads. Now I read books instead. Most Youtubers either have some kind of sponsoring directly in the video, or a Patreon because Youtube ads are clearly awful and ineffective.
I think Patreon and Netflix et al. proves quite nicely that enough people are willing to pay for quality content without ads. For the companies who want to market stuff, I don't have a solution (otherwise I'd be rich), but I do know I'll go to great lengths to avoid seeing your shitty ads.