Literally nearly every website on the internet does this. Even the ones you pay a fee to subscribe to.
Are you even a little familiar with GDPR?
Nobody is acting like they have a right to Facebook in this thread. Likewise, nobody is saying that Facebook shouldn’t be trying to make money. The issue at hand isn’t the choice between a fee and ads. The issue is that you have to pay to opt out of targeted advertising and that they’re using dark patterns to encourage people to consent to targeted advertising.
So the suggestion above that this may be illegal is accurate. You’re so focused on a person’s ability to not do business that you’re ignoring that there are laws regulating this type of behavior.