PSA: Ban rate does not imply the champion is outperforming
There are several champions who aren't out of bounds in terms of their overall performance, but are seen by the playerbase as problems because they either were at one time or simply have mechanics that require more thinking to play around than just knowing your own combos. Then there's an unfounded outcry when those champions receive needed buffs.
Yasuo has always been in this spot for both or the latter reason, and is about to receive a buff because he's been hit hard by the crit item changes.
Is also in this state, with people complaining about her getting offensive spells in lane instead of poking her when she goes for them or realizing it's just as likely she'll get a different kind of spell.
Also recently received buffs to her true damage, though there was little outcry about that.
The number of champions stuck in this spot changes from patch to patch, meta to meta, but there are some kits that are more prone to it than others. And at times it can even be a detriment to your team to ban one of them while the enemy picks a champion that's easily stronger.
Thankfully, though, Riot isn't of the same blind mindset as some people here on the boards. They recognize that player bias against an underperforming champion doesn't mean the champion shouldn't be buffed.
So downvote if you will. I'm simply telling the truth of the matter. Whining on the boards when your opinion isn't actually based in relevant facts will achieve nothing.