Advertising is wildly successful because it's literally everywhere and we are conditioned from birth that the whole concept of "strangers using psychological tricks so you give them your money" is just a normal fact of everyday life. Most people are NOT conditioned to be on-guard against ads, and that is the whole problem. It's not until you make the choice to actively avoid ads where possible and give up ad-laden media consumption altogether for a while that you notice how bad (and bad for you) advertising is.
If you haven't tried switching to a low-advertising diet, you are probably missing out on the ability to focus on what really matters in life.