Riot's Plan And Janna.
So riot's plan was always to keep easy supports like janna on an absurd state and completely broken so that bad players actualy play them for the freelo.Let me tell you something riot,even if you gave her 90% winrate and made her the most broken champion in the game most players would still avoid her,why? BECAUSE SHES BORING. Riot,your balance team is forcing in the meta the most boring, vegetable champion in the game.They know that there are so many champions to ban and that keeping janna permabanned would be too dificult so they just forced her in the meta.