Nobody would hate mega knight if it wasn't in every match
Title is about normal MK not evo
People used to hate ebarbs, now no one plays e barbs so they aren't hated. People used to hate xbow, now no one plays xbow so it isn't hated. People used to hate 3m, now no one plays 3m so it isnt hated.
Etc. , etc.
Is it genuinely unhealthy game design for such a noob friendly card to dominate use rates in most of the game? Undoubtedly.
Is the card itself broken? No, and it hasn't been since launch.