I'll give you some insights after browsing through all the Yasuo QQ threads:
- Mordekaiser is the fastest champion in League of Legend.
People like to negate the fact that Yasuo isn't too hypermobile due to his dash being "limited", so with their logic, it seems that Morde is indeed the fastest champ in LoL.
- Karthus's AA is the best tool in cs-ing minions.
Yasuo players like to stick with the fact that Yasuo's E is the best cs-ing tool. And they claimed that it's now "harder" to cs with him & thinks that his AA or Q is considered useless. So with that logic, Karthus's AA is now HELLA better to cs with.
- Magic damage among AD damage dealer is the most superior damage type, such as Pantheon's W & Jinx's E, and by nerfing these, they will have a hard time cs-ing.
While following the point of his E being nerfed, they're still not remembering the fact that his AD & crits were totally untouched, but hot damn, they'd still want to make his E nerf such a big factor to his kit. So therefore, if Riot touch any numbers to Pantheon's W or Jinx's E, these champions are immediately "unviable" & "out of meta".
- Galio has a higher winrate than Yasuo does, so Galio should be nerfed.
Yasuo mains constantly say that he isn't worth the nerf since his winrate isn't that high. So, better nerf Galio then.
- Mana-less champions will have a harder time saving their abilities more than mana-resourced champions.
They think Yasuo being able to spam his dashes & crits, or using Riven's triple Q to escape or missed hitting the opponent, is also such a big fat whiny factor. Say that "IT'S FINE! THOSE ABILITIES COST 0 MANA!!", and golly geez, hell just erupted from the triggered Yasuo/Riven mains.