Pirating is the right thing to do here. Even private division doesn't take that much of a hit that way, it's only epic that gets hurt.
The right reply would be buying on the Microsoft store.
LOL @ this concept that Microsoft is somehow a good guy here, or the one to support. Epic's tactic of getting exclusives to compete with Steam (likely the only thing that would work to take them down a bit) is what it is, but Microsoft have been a cutthroat corporation for decades. There's no altruism here, just pure business like the Corleones would say.