To claim the The Convert’s Catechism of Catholic Doctrine and A Doctrinal Catechism is not a reliable doctrine of the Catholic church is not convincing. I have personally found every reference I quoted.
I am not personally familiar with the texts you mention above, but my perception is that they are old documents. I think an underlying theme of what you are saying is that Catholic teaching has said a thing in the past, so therefore it is a concern now. But is this logically sound?
What is the Catholic teaching TODAY? When you include quotes from the 1800's, it makes me wonder why there are none from the 2000's? There may be current publications mirroring what concerns you, so why not highlight them?
I think you are concerned about the institutional structure of the Catholic church, while not focusing on what a modern individual Catholic believer thinks and believes. There may be value to this, but one must be careful to not discard the "baby and the bathwater."
In my own SDA religion, someone might say to me, Mr. Uriah Smith said this or that in the 1800's. But my response would be that they are dead and buried, and I'm not bound to something someone else said before. I am concerned with what I read in the Bible today and what's going on in my community today. Likewise, a modern Catholic should not be bound to what some Catholic writer wrote in the past -- provided its not a foundation for their current belief.
If there are CURRENT errors to be exposed, fine. But it seems weak to use examples from over a century ago.
KT