The only part of the deal considered worse than remaining or leaving is the Backstop. Which was put in at our insistence to ensure the Good Friday Agreement stayed intact. You know what that is surely? Although I'm sure you'll have some placitude about how no one wants a return to The Troubles regardless of what happens to the border
Anyone who thinks Northern Ireland is now some peaceful backwater of the UK where terrorism has been defeated and everyone lives in peace and harmony just needs to take a walk through Belfast. It's better than it was, but it's a fragile peace that is broken by both sides on a regular basis. Until the last child of the Troubles has passed on then that peace remains fragile. Neither side gives a toss about Brexit. They only care about the border with Ireland.