It's just ads. If we're talking about some ad for a coffee maker, whatever.
Now their whole selling data to unscrupulous folks, taking money from parents via their kids, selling fake news that makes people hate other people (now that gets into the ad space...) ....
That's where I'd want to nope out.
What users want, naturally, is everything awesome free forever. It's naive, though, to things that everyone should always get what they want.
As other have said, I agree there are hard limits and Facebook has violated them, in terms of selling data and collecting it without user's permission. That's different.