I read The Devil a bit differently than most people, so a quick heads-up before the reading.
Historically, "devils" weren't always framed as pure evil. A lot of decks, especially Rider-Waite, carry a Christianized view, which is why we tend to equate the Devil with evil now. But in older myths folks like Puck, Loki, and Dionysus were about mischief, excess, desire and the stuff we enjoy but sometimes feel guilty about. Even Hades was just the underworld god, not an embodiment of evil. Christianity reshaped a lot of that into the modern bad-guy image.
That said, The Devil can still point to harmful patterns. Context matters, though. If it sits near The Hierophant you might be looking at a more traditional "sin/guilt" kind of energy. On its own I see it as neutral — it can mean addiction or overindulgence, but it can also be about raw, unapologetic parts of yourself that society tends to shove down.
Reversed, The Devil often looks like disconnection from those primal, free parts. Maybe you were taught certain feelings are wrong, or you tried to embrace them and hit a wall. Kind of like getting ready for a wild party and your car breaks down on the way. Total bummer.
In your spread, Devil Rx reads like you want to say or do something but you’re holding back because you care how others will react. The Six of Swords as the clarifier makes me think that fear of judgment is nudging you toward silence — it avoids the immediate drama but means you’re bottling up the real stuff. The cards could be saying it’s time to stop holding back and speak your truth, even if it’s awkward.
Not the only possible read, but hope that helps.