Funny how Facebook can have all of this information about me, my preferences, my social groups, etc., and has not once served me a remotely relevant advertisement.
I think it most likely has but you currently aren't consciously aware of it. Partly this is due to your desire to make a point. Partly due to our inability to off the top of our heads to recall any but a few specific adverts. We see thousands of them. It is very unlikely that none of them have been relevant to you. There are also the adverts that subconsciously manipulate you. The stuff that you aren't aware of.
There's a bias at work too. The ads in the news feed are slip-streamed, if you aren't constantly on the look out for that gray, barely there "Sponsored" they look like "normal" news feed items and scroll past/through them only really noticing the bad ones.
Even worse are the socially slip-streamed ones that started as a Sponsored post in a friend's news feed that they found funny/interesting/whatever and re-shared. Once reshared it loses even that gray, barely there "Sponsored" tag and has "grown up into a real boy" in the news feed.
A lot of the mind games in the last election cycle happened because of that (target ads to people susceptible to reshare them and watch them go viral for relatively cheap). Facebook has said they may try to crack down on that sort of thing, but slip-streaming ads is where they make their most money and they don't have enough financial incentive to really fix that.
