The Orthodox view is that the Roman Catholic Church separated from the Orthodox Catholic Church beginning in 1054. To support that, they point to the fact that before 1000, there were several Patriarchs in the Church, such as the Patriarch of Constantinople, the Patriarch of Antioch, the Patriarch of Jerusalem, etc. When the Roman legates placed the letter of excommunication on the altar of the Hagia Sophia in 1054, all of the Eastern Patriarchs remained in communion with Constantinople and eventually Rome separated from them also. If these Patriarchs of the ancient Church had recognised the Papal Supremacy, why would they not have remained in communion with Rome, instead of Constantinople?
Also, the Orthodox do not accept the universal jurisdiction of the Roman Pope.
You say it is up to the Orthodox to ask for forgiveness and admit that it was wrong to separate from Rome, but it was the Roman legates in 1054 who declared the separation, citing for example the use of leavened bread, the married clergy, and the filioque issue. Why should the Orthodox seek forgiveness for using the Nicene creed as it was originally written without the filioque? Also, why should the Orthodox seek forgiveness and show humility because they have a married clergy? Please explain?