He taught ONE Truth.
This is not about Catholic vs Protestants and your and my opinion.
This is about God.
I put my faith in Christ Jesus.
God’s church is determined by God, not by men. No man can excommunicate another from God’s divine plan.
Each church run by man has some error - that is not the question - I assume that you are trying to imply that the Catholic church has not ever been in error? If it has been in error, then why did God allow that if it’s His church? You see, until the Christ is on the throne, there WILL be error, and all churches are in one manner or another in error. This does not destroy faith in God, it is upsetting only to those whose faith is in wrong thing.
As ye judge, so shall ye be judged. (before I would pronounce others a plague that verse should cause you to reflect on the fact that we all can be in error, and if you judge another in error, what will mercy will be applied to you?)
You keep affirming that there are “many” truths. That “each” man can discern for himself “his” own truth. This is absolute rubbish. Christ commanded His apostles “to go forth and teach...” He established ONE Church. This is to teach ONE truth for all nations for all ages. If the Catholic Church is not that ONE Church, then by your lights ALL of the early Church fathers, theologians, saints, and martyrs ALL got it wrong. This is too absurd a proposition to be taken seriously. It also defies explanation on the 10001 other contradictory and heretical Protestant faiths. Most of all, what you are saying is that all those leading non-Catholic theologians who after years of serious study and who converted to Catholicism, all got it wrong.
In short we are all wrong and you got it right!