I literally haven't won a single game with yummi on my team, or lost a single game with yummi on the other team.
Coincidence? I think not.
You can't even ban her in champ select because then whoever wanted to play her would just troll in game anyways. It's a lose lose situation no matter what you do. Only thing you can do is dodge, I guess.
I'm honestly very surprised that 1) Why new champions aren't banned from ranked on the patch f their release and 2) Why people wouldn't want to play their mains in ranked and try to climb 3) Why they would play a champion that sucks ass.
I'm a support main myself and literally only play Thresh, Zyra, and Lulu, and I will not play any other champions besides these 3, despite being proficient on pretty much every support. The game is alot more enjoyable when you play what you're good at.
If i'm trying to play Yuumi in Ranked it's because my carry has picked something I know doesn't work with my 
support one trick AKA 
or 
.
If you ban Yuumi you're getting my one trick. Sure I can play Morg, Nami, or Lulu passably, but I won't. You pickban your teammate you can't expect them to pick something you'll like.
