Are you going to quote somewhere where an actual Catholic says that the Catholic Church is unaccountable then, and not simply Josiah and his claims that the Catholic Church says it is unaccountable?
The RCC itself alone insists that it itself alone is the one authoritative teacher and that it and it itself alone is incapable of error in official matters of faith and morals, and yes it itself alone insists that whatever it so teaches is to be embraced with "docility."
The RCC itself alone says in the Catechism of itself about itself, "Mindful of Christ's words to his apostles: "He who hears you, hears me", the faithful receive with docility the teachings and directives that their [Catholic] pastors give them in different forms. .
Note that the point of the RCC is NOT that the teaching is true or correct, but that it is to be embraced "with docility" because it itself is teaching it.
The Handbook puts it this way, "The Catholic is thus freed from the typically Protestant issue of whether the teaching is true and rather rests in quiet submission to the Church which is Christ's Authority." (The Handbook of the Catholic Faith, page 151).
None of these things say that the Catholic Church regards itself as not accountable.
Note several very, very important things.
1. The Catholic is FREED by the RCC alone from the issue of whether the teachings of the RCC are true!!! The issue isn't truth.
The Catholic is freed, but he is not forbidden for a person to understand why. I have done lots of learning about why the Church teaches what it teaches, and I still accept it.
2. And "RATHER", in lieu of that issue, in the stead of that issue, in place of that issue, he "rests" in "quiet" (unquestioning, unthinking) "SUBMISSION" (a power word). The Catechism says, he "receives WITH DOCILITY" whatever the RCC tells them.
Submission is not the same as surrender, but you keep acting like it is. The Bible says that women are to submit to their husbands as the Church submits to Christ. Does that mean that women are to simply serve, unquestioning, like automatons? No. But if you think so, then no wonder you are not married! Rather, submission means trusting and accepting and allowing that other person to love you. Without trust we can't have love. But a wife has the right to understand why her husband is doing something, and to refuse if it is unjust. The Catholic Church is not unjust; she is ultimately merciful as Christ is merciful, and is really a pillar of justice in the world today. That is my experience.
I have already seen others try to explain to you the kinship of the word docility and teachability. They failed because you have to defend your platform at all costs. But ultimately, being docile is what Jesus tells us to do in Hebrews 13:7. It doesn't mean
unquestioning, as you keep asserting, and it doesn't mean
quiet. Those are words that you have inserted into the text that are simply not there.
87 Mindful of Christ's words to his apostles: "He who hears you, hears me", the faithful receive with docility the teachings and directives that their pastors give them in different forms.
3. So, yes, the RCC insists that there is one who is exempted from accountability in official matters of faith and morals, one where the issue of truth is moot, one to be given a "pass" on accountability : itself. It replaces the issue of whether it is correct with the issue that it itself alone insists that whatever it itself alone teaches is rather just embraced with quiet, docilic submission.
Maybe we are just talking past each other. Maybe you can state clearly, without rhetoric, what exactly passes for "accountability" to you.
Again, you insert the word "quiet" to support your own platform. The Church doesn't teach that. Therefore unless you can prove that they do, then from now on you are not simply misinformed, you are knowingly deceiving, and that is an offense against God.
It itself alone thus just by-passes the issue of correctness (in the sole, exclusive, singular case of it itself alone) and replaces it with the insistence of it itself alone for "SUBMISSION" (a power word) to it itself alone.
Again, St. Paul calls wives to submit to their husbands. If to a Protestant to "submit" is a "power word" then I am glad I'm not involved in that kind of marriage.
CCC #86 states that:
86 "Yet this Magisterium is not superior to the Word of God, but is its servant. It teaches only what has been handed on to it. At the divine command and with the help of the Holy Spirit, it listens to this devotedly, guards it with dedication and expounds it faithfully. All that it proposes for belief as being divinely revealed is drawn from this single deposit of faith."
That means that the Magisterium, which is the teaching office of the Catholic Church, submits itself to Sacred Scripture. So there is your accountability.
Now, a quote from you:
"The Catholic Church is and always has been inwardly self-accountable for doctrine."
.
Note: "INWARDLY, SELF-accountable" 
Maybe I chose the wrong word. I apologize. It is evident through all historical records that the bishops of the Catholic Church have debated, expounded, and worked together, correcting each other, and with all possible effort, produced doctrine that has been universally accepted. There is really no other way to run a Church. Thankfully, the Holy Spirit was promised to this one Church such that they would always be led into all truth and be able to always remember the fullness of revelation and safely propound the true faith.
Need I post the scriptures again? One eternal Church, Matthew 16:19, Protected from error, John 14:26, John 16:12-15.
What has been the Catholics point in all these threads on accountability? That the RCC alone has some "unique" status, according to the RCC alone, and this makes it EXEMPT from the accountability that it demands for all OTHER techers.
False, that has been YOUR point in all these threads on accountability. No Catholic really wants to talk about your personal pet peeve issue, which you are incorrect about but since you are neither docile nor humble, you are also not teachable.