Except under the rules of deal I thought, Doom wasn't beholden to them, he'd certainly have checked the wording of any deal beforehand as he's the master of "fine print". They'd had their sacrifice, they gave him power, so it was done and done. To solve it all with "Well, we changed our minds because you were rude about us"... sorry, that's just... weak.
And Dooms "magic" armour doesn't provide his nose and mouth with the same level of protection as his tech armour? which WAS resistant to Sue's forcefields? Unimpressive.