"She" did not give me anything. It is God himself that has revealed his truths to mankind and seen that these truths have been preserved for all. Constantly taking credit for your religion as "The Church" is simply false, expected, but false. The reason is simply the fact that God revealed his truths to mankind long before there ever was a formal "church". Going by your logic, the Catholic Church can claim credit for writing the Old Testament as well because that is also Holy Scripture. Now if you are willing to agree that all those who are in Christ are members of the one body, the church (notice the lower case "c"), and accept that even those who believed during the time before Christ came are also part of this universal body, then I will accept that the church was endowed with the knowledge of God's truths, certain ones were inspired to record those truths for posterity and they as a whole, through the power of God ensured these recorded truths were preserved for all mankind. Do we have a deal?
The Catholic Church has indeed written what she wished and has passed it off as if it is from God over these many years. It is called "Holy Tradition". This has served "her" well in that her followers have been told that whatever "she" tells them it is as if God himself said it. Acceptance of it all is made mandatory if the members expect the "beatific vision" (heaven for us normal folks). You can certainly believe all that to your hearts content, but please spare us the condescending "you will be the wiser" advice. I KNOW where my faith lies - the source.
I realize that for Protestants this is a scary issue, and it shows just how scary it must be, by how emotional their responses can be. Especially for ex-Cathoics who often seem more Protestant and more anti-Catholic, than the "cradle" Protestants, because they know they left the Church and now it seems like the Church was right after all! That must be a rather sinking feeling, I would imagine.
The Catholic Church does not claim it "wrote" the entire body of scripture (just the New Testament), but all evidence shows the Catholic Church decided which books will constitute the Christian canon, and which won't, and that included the Old, as well as the New Testaments.
Individual human authors wrote the books of the New Testament, and they were all members of the Christ's Church. It was the hierarchy that church that decided which books will be part of the Christian Bible. As far as I know, the Protestants accept that decision for the New Testament 100%, so why the denial?
The basis of your beliefs: the existence, divinity, death and resurrection of Christ, the importance of faith in Him, the expression of these beliefs in the Scripture, -- is what the Church gave you, under divine guidance. You are correct that the divine revelation is not limited to the New Testament, nor even to the Scripture as a whole. The created world and its laws are, for example, a part of the divine revelation that science reveals to you. I did not take claim for something the Church did not do, just for the things she did do.