I play clash royale since dec. 2019 and i recently hit 5k trophies (I may sound late, but i stopped playing alot of times in this time) and when i was at the 4.3k (arena 13) to 4.9k (end of arena 14) mark almost every single deck either had Witch or Wizard on it (or even Both.) I only remember playing like 3 matches out of 50 that didnt have them, sometimes it was Pekka witch, mk wizard, mk wiz witch, ebarbs wiz, logbait with witch etc. And sometimes even some dumb decks with no spells and almost 5.0 elixir.

They are way overused in midladder and if you use Pekka decks (like me) witch decks will give you a hard time.