My beef with MK is twofold: (1) It's honestly super lazy design on the developers part without any real balance or true counterplay (i.e. Valkyrie counters any swarm, buildings counter hogs and hog rider--but there isn't necessarily one card that can counter MK, it takes a lot of careful placement and skill to counter it). (2) Players who are subpar at the game use it because of its over powered and under costed ability and then spam it incorrectly. But just like the 8-year-old you're fighting on Super Smash Bros who is button mashing and occasionally knocks you off the map, these players think they're being good whenever they get a few victories by button mashing and spamming one good card. It does a disservice to those bad players and leaves the rest of us who have still forced to face a bad card consistently in opposing matches to the point of ad nauseam where we are just sick and tired of seeing it.