>>18594427A lot of things affected the metagame; Knock Off and Defog boosts, Megas, Steel nerf, weather nerf - but Fairies had a huge impact on the meta in its own right.
Suddenly Kyogre has competition at the top of Ubers; LC has a new threat in the form of cotton candy; UU's stall broken by MegaWaifu and Klefki's SwagPlay until they got banned; suddenly shit like Azumarill, M-Mawile, Sylveon, and Clefable find themselves in OU and the first two near the top in usage even when the ladder was adjusted, and Togekiss is back better than ever. Meanwhile Salemence - in part thanks to ZardX - who was once the pinnacle OU physical sweeper became UU just like that.
Clearly a denial of Fairy type's impact on competitive is a sign of deep homosexual repression, I'd recommend seeing a psychologist.