NOBODY, no human being or groups of human beings are infallible, no matter what they claim about themselves.
God never told us that he would establish a ruling body of clergy who would speak infallibly to us about spiritual and moral matters.
The Catholic church is not infallible either, as is readily apparent to anyone who is honest about what they see.
That cannot help but remind of the relativist creed: all statements are false including this one.
You have cut off your own legs.
In the future, I'll assume you mean this, and give your opinion and that of your church the worth you have assigned it: none.
Christ was much wiser than to entrust His Church to such a hopeless scheme.