"Riot keeps letting CertainlyT make champions, do they have any idea what they're doing?"
Yes. Riot knows EXACTLY what they're doing. The fact is, that despite every single one of CertainlyT's original champions being a balancing nightmare which ruins solo queue and professional play, his champions are fun for the person playing them. They style on opposing champions who don't have nearly as many tools as his champions do.
Getting oneshot a screen away by Zoe? Feels pretty good for thr guy doing it. Playing a champion like Xerath and being unable to do absolutely anything meaningful to Yasuo because he has half a brain and a functioning E key? Makes the Yasuo player feel skilled for dodging all over the place and then dumpstering you for having no tools which work against him. The fact is, CertainlyT's champions sell skins. Kled is two years old without a new skin despite the fact that there are so many potential themes for rider and mount, yet Zoe got a pool party skin already (keep in mind that they didn't want to give Annie one because of the implications.)
Look at the skins CertainlyT's champions have. Darius with two legendary skins. Yasuo with a legendary and a massive fuckton of other skins. Thresh with a legendary and a bunch of other skins. Kalista with a championship skin.
Yes, Riot knows CertainlyT's champions are stupidly unfun to play against, are a balancing nightmare, and are impossible to keep fair in both solo queue and professional play. No, they don't care. It makes them money, and money speaks louder than any board complaints.
is the first champion that literally had an ability built around securing penta kills. Katarina was also sorta like that, but her release version was way less about fast execution than her later versions.
The outrage when Darius was first released was loud, and there were so many discussions on how he would starve gold from the carries back in season 3.
has the ability to literally block entire kits with his wall. He's also one of the only, if not the only, champions that can use an ability cvia other champions kits (knock up).
literally a dash with every auto
old Nidalee playstyle where you'd get oneshot from more than a screen away, only this time she can also CC you to guarantee that it connects
some weird thing about forcing a juggernaut into bot lane
for some reason, even though we just sorted this out with the assassin rework, has true invisibility that you can't reveal in any way what so ever. Camouflage and invisibility was made for the purpose of making stealth less frustrating.