Finally - as I pointed out elsewhere, up to the 16th century virtually all Christians believed that the bread and wine truly becomes the body and blood of Christ.
If the Apostles, their disciples etc. - whether the St. Thomas Christians in southern India (separated from theCatholic Orthodox for 1000 years, or those in Assyria (separated from 240 AD) believed that the Eucharist is the true body and blood of Christ.
If every single Christian before the 1600s believed that this is the True Body and Blood of Christ - why do you think that the 17th century innovation has more weightage?
As I’ve noted before, not one instance in the NT where His actual real blood was offered at the Lord’s Supper. Not. One.
Not one instance of any disciple or believer trying to capture His blood at the crucifixion nor trying to consume His actual flesh. Not. One.
What we see in Scripture denies Rome’s claims on this, and many other issues.
As one of your fellow RCs noted, the writings of the ECFs are not inspired. They are at best commentaries on what they think on the topic.