Why does Riot refuse to nerf ANY of the problem champs properly?

are all running around in EVERY game you play, making it zero fun and an overall toxic environment.

So what does Riot do? -5 AD nerfs (you know what I'm talking about: Vayne during season 5). Essentially nerfs which are about as minuscule as slightly tapping them on the shoulder. In Riven's case she got instant compensation....which ended up being a buff due to the nature of Riven as a champion (one trick champ).

All of the champions I've listed have kits which lack any significant counterplay right now due to either an item, rune, their abilities removing each other's counterplay (think Yasuo and Irelia) or all of the above.

is one of the worst offenders here, as he abuses Conqueror+the additional healing runes, his healing is absolutely disgusting and also has elements in his kit which allow him to kill you with just autos (being his passive, auto reset on E and bonus AD on ult). Then he can just build Death's Dance and he's essentially a raid boss. Aatrox also doesn't really get punished for missing his Qs anymore thanks to his Riven-esque Q buff, wherein he gets to just permanently have it up or at worst it goes on cooldown for 3-4 seconds. Sorry, but that's not really much of a window to punish him, especially since his passive stings and heals so much.

Then you have who initially got nerfed but then Riot couldn't let her be bad for even a single patch so they kept buffing her back to broken tier. Her kit is a clear indicator of what you SHOULDN'T do when reworking a champion. For the sake of being concise, she's far too mobile, overall overloaded and her kit's counterplay is eliminated by her passive and said mobility.

is als worthy of a mention as he's been absolutely broken as a support for almost a season now and yet there has been 0 actual relevant changes to hinder him in any way besides a -20 damage to Q, which to be honest doesn't even make sense since Naut's strength isn't his damage, it's his general tankiness and CC.

One final example is , but for a different reason....his kit is the very definition of toxic. Additionally all of his counterplay is removed since his kit has so many options. His Q's lack of range is negligible since he is hyper mobile with dash, which then brings the issue of him being squishy; yet he gets a shield just by walking and moving; which THEN brings it back to his E in that he can stack his passive just by dashing. And THEN on top of all of that....Windwall, THE single best ability in the game imo. Windwall pretty much means you can't poke down his passive if he so chooses to, as well as the obvious fact of the matter being that it blocks ALL projectiles in the game AND it's extremely lenient. Oh, and then he has ult which gives him armour penetration for some reason? To this day I still think he doesn't need it.

tl;dr Riot is refusing to nerf/rework/change in any way toxic, anti-fun champions that have been nuisances ever since their release or since new runes and/or Spear of Shojin.