I quite like supports, but the thing is if your team refuses to pick a support and you wind up filling, it's usually a terrible game. Your ability to swing the game as a support is reduced, and meanwhile people who stubbornly pick assassins when they have no supports are universally awful players so you've wound up supporting a bunch of bads. Best you can generally do is drag out the loss.
I don't know why some people are convinced she's terrible. She still seems decent to me.