All of those champs besides zyra have hard to balance kits and are dominant and toxic examples of their respective classes.
Darius only counterplay to this day remains "dont go close to him", he needed a rework to make him proper counterplay.
Yasuo, while not being op, is still opressive, especially versus mages.
Thresh, before hard nerfs and new supports was and still is overloaded, he is not and was not good for games health at all.
Kalista is a monster.
He made mordekaiser into a bot laner with the rework (DAFUQ????) and as such had to give him a broken passive and kit to even make him CLOSE to viable there.
Caitlyn was worked on by many people,but is opressive in how her sieging kit works because she also has insane damage without the sieges.
All of these champions he had any hand in are inredibly hard to properly balance and are opressive to play against. Theonly 2 good champs he has worked on are WW and ZYRA. THATS IT! There is areason why his ass is hated. ANd that is because while hemakes fun to play champions, his champions are complete crap to fight against and have shit counterplay options.