He is a humble man, trying to impress more humility on the church. What is your point here? Pope Francis is a decent man trying to do decent hints. He grew up in a world of misfortune, where many poor people struggle. If he chooses to merely call himself the bishop of Rome, I see no harm. The Pope is, after all, the bishop of Rome is he not?
Further, from Stephen I, to Leo, to Gregory, they all referred to themselves as the Bishop of Rome. Further, the term Vicar of Christ and Bishop of Rome are interchangeable.
Humble man? You bet he is! And he'll be the first to tell you.
“The Council Fathers knew that being open to modern culture meant religious ecumenism and dialogue with non-believers. But afterwards very little was done [!] in that direction….“I have the humility and ambition to want to do something.”