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.
I mean no... they don't have to my (or my employer's) site.
I love doing things users like, and I do my best to do that often, but straight up it's not their site. If someone wants ads on their site ... I don't see a problem with that on the most basic level.
Fake news, other content, we're talking about something else.
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.