It's a cancerous deck not because it is unbeatable,but because it makes a huge variety of decks completely uplayable.
''dur dur,imma beut dem with smorc,jast prussure dem dur dur''
Yeah but what if you don't like face and midface decks?Quest rogue makes almost all the value and most otk decks obsolete.If any non smorc or midface deck becomes popular then quest rogue will fill the ladder.
''cuntrul nuds a cunter tu,l2p''
Do you remember any meta where control dominated and we needed a counter for it?Yeah me neither.Especially now that there is also jade druid.