Orianna is the most broken champion in history
Her damage is on the level of someone like
, but the key difference is that she can always threaten the back line, while these champions can rarely touch it. Watching G2 play, Orianna is the only champion that makes their midlane look presentable. On Cassiopeia - below average, on Corki - worthless, on Lucian - worthless, but get Orianna and your KDA will thank you for it. And the worst thing is, she has been a contested pick in every pro season. Nerf or rework that cheat code of a champion.
And btw, the perceived level of difficulty is not a valid argument.