The bar to being an anti-christ is pretty damn low. There's also no limit to how many exist all one needs is to deny the divinity of Christ. It's just that easy!
There some conflation with the "Man of Sin/Lawlessness" though who is supposed to be a "fierce King" who appears at the end of times and “will exalt and magnify himself above every god and will say unheard-of things against the God of gods. He will be successful until the time of wrath is completed."
Uhhh... They have kind of absurd political power. The Vatican is essentially the decision making body of something a close to an international political business with a history of teaming up with governments to support initiatives.
Like look at the genocidal regime of residential schools in Canada. While they were a government initiative 2/3 of them were run directly by the Catholic church.
Political power doesn't always mean strictly "interfaces directly with official government" either. Politics is the web of citizen buy in to how the world should be run. The Catholic Church is incredibly influential on citizens many of whom take the directives of the church and translate it into agency in a multitude of ways. It's not a perfect control but it's certainly used to shape the political landscape the world over.