I'm only mildly bothered by the tracking, since it seems so inaccurate, but the ads themselves always drive me to adblockers. Taboola were running pictures of rotten teeth for a while which was intolerable; Youtube ads are often louder than the videos.
It really depends on the ads, I believe. You can't actually read that page when the ad people go all out. There will be a video playing in the background of the page, there will be animations in content and they will throw in a pop over saying if you really, really, really don't want to save $10.
They may be inaccurate when you actively block trackers but they are surprisingly effective if allowed to do what they want. The whole “I think they’re listening to me” effect is because of how effective these trackers are.
Web tracking data gets combined with your real life digital breadcrumbs collected by the data aggregators. Their profiles of you are extremely accurate.
