Just because you spend a lot of money doesn't mean the right shit is outputting on the right channels. It could just be that this game heavily benefits from outputting 7.1 audio to virtual surround, something you don't get on expensive DACs, but do get on comparatively junky Sound Blaster devices. It sounded great on my SB G6 and much, much better on my GC7.
Here's someone with a similar experience (though they're outputting from their PS5, which also works fantastic with either of those Sound Blaster devices.)
Sometimes gaming audio devices really are just better for gaming than expensive audio devices.