Facebook ads for me are "anti-ads". They associate the product with really bad feelings through poor contextualization.
I'm routinely surprised that despite me talking openly about my interests, I just don't get relevant ads. On one of my most frequently used sites (about basketball), the ads this week have been all womens fashion. I've not searched womens fashion and my wife doesn't use my laptop or phone. Waste of ad money.
I have come to understand advertising a lot better since I asked, while looking at some lingerie ad, "Who would ever want to wear something like that?" and someone replied "This ad is for your spouse who wants to see you in this."
The same reason that underpants come packaged with pictures of hunky guys on the front. The guys aren't there for the men wearing the underpants, so presumably they're there for the women buying them.
They don't crop the faces off the model's picture only for costs. They don't have a face so that it's easier to project yourself with said body.
Meanwhile, I research hiking trips almost every day of the year, talk online about hiking frequently, and I can't remember seeing a single ad for hiking gear or anything remotely related.
https://greasyfork.org/en/scripts/22210-facebook-unsponsored
Fixed it for me. Web-only, but I just removed the icon from my phone's home screen and my FB usage went way down, which I think is a good thing.