As said, when you have an actual argument versus mere assertions, then get back to me. Rome cannot be the one true church because it is based upon the premise that historical descent makes it so, but which i a church presuming an assuredly infallible perpetual magisterium, infallibly defining that it is such, and the one true church, by which circularity you have your assurance.
Thus you are not to engage in objective examination of the Scriptures in order to ascertain the veracity of its truth claims, but instead she calls for implicit assent of faith in its leadership when teaching officially.
Therefore by making the church the supreme authority over Scripture, she operates under under a model of cults, and is contrary to the NT church which began upon Scriptural substantiation in word and in power, believing in an itinerant Preacher who established His claims upon the same, in dissent from those who likewise presumed of themselves above that which is written, though they were the stewards of Scripture, etc.
But being not subject to Scripture as the supreme authority, what Rome officially teaches includes perpetuation of the errors of traditions of men, and which fosters faith in herself and one's own merits for salvation, dead ritualism, overall liberalism, perfunctory professions or such blind zeal as many RCs example here. And what she does manifests what she really believes.
Which is in contrast to the body of Christ which is visible by fruits of manifest regeneration, in superior commitment to core truths and devotion and service, and conservative moral values.
As a former weekly RC, CCD teacher, and lector, after i became born again, i, even as one who constantly needs mercy and grace, knows the profound difference institutional faith and living faith and the fellowship of the Spirit resulting from a shared personal conversion to Christ out of a broken heart contrite spirit, and Scripture-based relationship with Christ. And which is greater than external organic tribalism. But which we realize with very few RCs (or mainline Prots), as they trust in their church, and or own merits.
I am “born again” every time I am with Lord Jesus during the Eucharist. Any man or woman that would walk away from the Eucharist never believed in the Real Presence. It is unconscionable to think that anyone could abandon Christ. Lack of faith is the reason. It is always the reason. It has been going for 2,000 years, starting with the apostles. You didn’t believe, therefore your left. I will say a special prayer for these lost souls at Mass.