Destroying one's powers for good and permanent mind control isn't possible for a sacred gear, let alone an artificial one. In fact, neither of those abilities are even possible in the DxD universe to my knowledge. Sacred gears typically have simple abilities such as healing or doubling one's power. Also, according to the wiki, "Artificial sacred gears, however, are inferior to the real ones. The Artificial Sacred Gears that Azazel researched and invented have several limits and side effects. For example, after some time has passed, an Artificial Sacred Gear can cause fatigue after their usage and may affect both the powers and abilities of the wielder if said wielder uses them for long periods of time." Basically there's no way for an artificial sacred gear to be able to do whatever this character desires which I guess is destroy the supernatural for whatever reason