Save that nonsense for people who become Muslim, or Buddhist, or even for those "Presbyterians" who worship some entity they call "Sophia". Orthodox Catholics profess faith in Jesus Christ every bit as much as you do.
But, BTW, your whole "it never took" line of argument kind of drops "assurance of salvation" on its head. How can any Proddie really know that his "assured salvation" really "took"? Because he feels it really strongly? Maybe that's where the Mormons got their "burning in the bosom" idea?
This 'Proddie' says that it is as valid as a mackerel snapper's 'poorly catechized' claim.