stop letting certainlyt design champions
Basically every champion he's ever made is incredibly broken and unfun to play against. He is by far your worst designer.
Darius-unfun to play against when viable. Linear gameplay that only seems complicated because he has a million passives/overturned kit. Zed- unfun to play against since his release will probably be nerfed to the ground soon. Overturned kit. Thresh- super overturned kit as well. I wouldn't say he's any more unfun to play against than blitz but he has his moments and I don't think anyone's thought of thresh as ever being too weak. Zyra- best champion on this list(also two other designers involved) Yasuo- also a million passives, overturned kit(high burst and sustained damage a shield, aoe knock up, wind wall mechanic and mobility on one champion) Kallisa- also unfun to play against especially if melee. Overturned kit.
You can argue that these champions are fairly balanced(even though id disagree), but basically none of them are fun to play against because of the way they are designed. Also this http://www.gamefaqs.com/boards/954437-league-of-legends/68934978