The churches in Revelation which refused to obey Christ in straightening out the problems HE pointed out to them were removed.
Catholicism, if it is indeed the OTC, is in no different a situation.
God will not protect someone in their willful and defiant sin, and His promise to never leave or forsake, is given to individual believers, not religious institutions that man has set up.
So where is the evidence that Jesus has not abandoned the Catholic church? Show us what He’s doing in it today.
I am a member of the Body of Christ. The self-amputated branch cannot bear fruit. The severed Hand can not heal the Body.