Yes? What are you trying to prove by this? I just looked over all the banned champs statistics.
According to these statistics alone, and I'm assuming that you also agree that Darius is OP, then that means Twisted Fate, Malphite, Morgana, Nautilus, Ahri and Shen are even more OP, again according to these statistics alone.
And just based on experience, I can go on ALLLLLL day about how Alistar is arguably one of the most "OP" champion in League of Legends right now compared to Darius, even the statistics show that, but no one really makes complaining threads about Alistar compared to Darius.
Also I looked into Ahri specifically, and she has a much higher percentage of win rates in Platinum compared to Darius, and she is 5th most banned champion, however many players don't complain about her being OP, yet there are so many threads such as this claiming that Darius is OP.
So I still don't even know what you are trying to prove? I said he is a very good champion, he has a low skill cap, which doesn't mean that he isn't good, it just means that somebody can pick up Darius much faster than say, ex. Shen. I mean to say that he is not over-powered in that he completely throws the game out of proportion, and completely dominates team fights and is unstoppable which is totally not true.