Your institution is not in those passages. Your priests/leaders 1 Cor 5:11 meansreal believer should not even eat with them.m They either did not expose sin or sinned. Those sins are the ones means we are not to associate with them. You see those verses are outweighed by other verses. It is not merciful to pretend that the sin does not exist. To put them out gives them a chance to be saved. They have harmed the sheep.
So you have nothing, no flying colours. You cannot justify the bad/evil/foul smelling fruit of your leaders.
Matt 18:17
If he refuses to listen to them, tell it to the church. And if he refuses to listen even to the church, let him be to you as a Gentile and a tax collector.
2 Thess 3: 14+
If anyone does not obey what we say in this letter, take note of that person, and have nothing to do with him, that he may be ashamed. Do not regard him as an enemy, but warn him as a brother.
1 Tim 1:20
Among whom are Hymenaeus and Alexander, whom I have handed over to Satan that they may learn not to blaspheme.
2 Thess 3:6
Now we command you, brothers, in the name of our Lord Jesus Christ, that you keep away from any brother who is walking in idleness and not in accord with the tradition that you received from us.
Your leaders kept on sinning, they were not stopping others constantly hid that sin making them part of the sin. We are not talking about laity we are discussing leaders. Their sins harmed the sheep, these sins harmed them for their the rest of their lives, sometimes turning the sheep away from Jesus. They prove that your leaders are not apostolic and do not follow Jesus and the apostles. They prove your institution was not founded by Jesus. You have nothing at all.
Leaders are to be an example, your leaders give examples of lying and teaching false doctrines, they give an example of hiding sin, they give an example of condoning sexual immorality, in this country they give an example of defrauding the goverment and thus greed, the list of the example they give throughout the centuries is one of evil deeds. These are not leaders of the real church.
Your quote about mercy is a joke right as your leaders did not show mercy towards their victims at all, they lied about them, they deliberately tried to avoid giving them any recompense at all. So the RCC idea of penance is a joke, isn't it. I mean penance is about making right and your institution did all it could and is still doing all it can to avoid making it right at all. it did not even start to be truthful about it, until the news brought it out in the open. If you watch the movie SPOTLIGHT you will see the extreme lenths the leaders went to, to stop the press printing the truth. Read the stories in Broken rites, they give a glimpse into what the children went through.