I've got three perfect Riven counters
- Auto-attacks? I'll dodge them.
- Early game? lol
- Sustain? All of it.
Oh wait, GD nerfed all three into unviability. Welp.
All aboard the Riven QQ train! Choo Choo!
Clarification: I was pointing out that Riven wasn't popular before her biggest counters were nerfed
Riven never showed her face when these champions were dominant. Jax was THE hyper carry top (this would have been a free win lane) and Renekton won game long before Riven ever scaled. Aatrox did Aatrox things before he was gutted.
This is what happens when your balance system operates by gutting whatever GD is currently whining about before eventually reworking them a year(s) later.

CYCLICAL BALANCE kiddos. Only the tallest nail gets the hammer.
Edit2 - I am well aware that
counters Riven. In fact, the whole point of the post is that I don't feel Riven needs nerfs and that even if she did, it's only because GD's terrible sense at balancing removed a lot of her competition.