There's way too many slows in the game...
No, seriously, it's overwhelming....
Before, any form of CCs (slows included) were included in champions' kits and built around it in a way it's relevant to that specific champ and its needs. Nowadays, it feels like any reworked/new champion NECESSARILY needs either several hard CC, several slows, or BOTH.
Almost everyone has access to it, and yet it counters so much champions and feels frustrating beyond frustrating