On the other side of the spectrum: using the Instagram app was the first time in my life I felt positive about the ads I was being shown. I was shown ads for microdosing psilocybin (it's legal here) which blew my mind hahah. It's almost like I got through the uncanny valley and into the other side where ads are actually relevant!
Pretty weird since I almost never use Facebook. But I use Google, GMail and YouTube all the time ... and yet, the YouTube and Google Ads really suck! (They seem to be based on IP address rather than identity: I keep getting shown stuff that's obviously based on my housemate's browsing.)
To be clear there was still the gross undercurrent of "okay, why the hell do they know that?" but it was nice to see it actually working as intended for once.
I feel cruel saying this but I really think it's true. Just like how most games have microtransactions because a minority of people who will spend an incredible amount of money on them. Most people are caught in the crossfire and ads just annoy them and steer them away from the product, but mass advertising is an effective way to target the minority who ultimately spend enough on the product to offset the cost.