I do understand that you dislike playing against Riven, but please consider the following: Riven has many loyal players who love to play her. She probably has the biggest fanbase of all champions - who all love playing her. Us Riven players don't play her because we are Satan (well, I also like playing Teemo, so I am probably an exception) or want to win (if I want to tryhard in Ranked I don't play Riven. She is too hard and not rewarding enough - my op.gg is proof of that).
We like playing this champion and her general character.
So do laugh and make jokes about us, we understand it and can deal with it. But always be aware that even Riven mains have a heart. Thanks.