Team Rocket is known for their criminal plans and unscrupulous deeds, so there's no telling what they might have done to make Mewtwo as mad as it seems to be
Overall, Konami did have a difficult time building Rock-type monsters for years, but that does not mean that the type is not home to some incredibly strong cards
Dragon's Maze In 2013, during our second trip to Ravnica, Dragon's Maze revisited split cards
Attune with Aether and Rogue Refiner, banned from the energy shell that built the backbone of Temur and Four-Colour Energy, are decidedly the former
May I also recommend cards that don't target including, but not limited to Anger of the Gods, Blazing Volley and Scouring Sands to get around cards that grant some sort of Hexproof, Protection, Shroud and/or Ward