How the balance team decides of the balance changes is seriously beyond my understanding.

Sivir, whose winrate was near the 50% for a long time, while still having an alright playrate. +30 base damage on her Q (good thing it's being hotfixed to +10 instead)

Fiora, whose winrate has been 48% for ONE PATCH after her nerf from something like 51-52% winrate and thus has been for dozens of patches. Nerf already partially reverted

Ekko, whose winrate and pickrate were respectable for an AP assassin mid laner and still saw some play in pro level of play. -2 seconds off his E, scaling down to normal at lvl 13

meanwhile

Ezreal, suffering from many indirect buffs, starting from Death's Dance nerfing his pokr style by tons, crit items being buffed, thus allowing late gane ADCs to reach their powerspike even more quickly than Ezreal, and BoTRK rush being a thing which hurts his laning phase again, and having an absolutely pitiful 44-45% winrate for like 6-7 patches in a row, with his playrate going down with each patch. Don't worry guys, let's just reduce the cd on his Q by 1/0.75/0.5/0.24/0 second! He's not bad, he just needs a little boost! :D

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Please let me understand what is going on in Riot's head.

And hey look at that, Ezreal's winrate spiked a lot! It went from 45% to 45.8%!!!!