The reason people turned to ad-blockers is because the ads became too intrusive. They were fine (or at least bearable) when they were just simple text boxes next to your Google search results, or maybe when they were static banner ads. But then the advertisers came up with pop-ups, pop-unders, video ads, 2-hour long ads in the middle of YouTube videos, and all kind of other nasty shenanigans that hijacked your computer and rendered it completely unusable. The advertisers have only themselves to blame for ad-blockers.