Countries don't quite like being seen as the bad guy. China was very much not happy about portrayal in BF4 for example. You can also still tell a striking and provocative and interesting story without the same old cast of real world adversaries. Make it fun, make it interesting, lets explore ideas like a global protectorate PMC that amasses power to rival that of NATO that likely has ulterior and nefarious motives for its effective global domination.
I'm playing battlefield to shoot guys, not consider the financial ramifications of sanctioning France for leaving NATO in this story or debating in the UN about what to do over Pax Armata. I'm gonna instead just go blow up a building while thinking of limp bizkit.
Sometimes you gotta suspend disbelief and just go with the flow man.