On my Catholic education:
8 years Catholic grade school
4 years Catholic high school
weekly CCD classes by quite conservative Novus Ordo RCC priest
parents subscribed to National Catholic Register, the Wanderer, Fidelity and The Remnant, and I read them while growing up
my parents fought the Novus Ordo modernism tooth and nail and are now in the SSPX - I would politiely challenge you to ask them if they considered me to be inadequately catechized
I subscribed to Fidelity and Remnant in undergrad college and never stopped contending against modernism in the Catholic Church
Yes, on 1 Cor 3:15 and Maccabees, I was thoroughly catechized in those passages. “And as it is appointed unto men once to die, and after this the judgment.” Heb 9:27
I got saved when God convinced me that only Christ’s death is acceptable as full payment for my sin.
I wish it were possible for everybody to get just the right amount of catechesis, like Goldilocks.
Speaking seriously, I don't believe that it is Catholic teaching that Christ's sacrifice is NOT a "full, perfect, and sufficient sacrifice for the sins of the whole world". It doesn't appear that Purgatory has anything to do with that. And I for one will be exceedingly grateful for the opportunity to get cleaned up, whether (as another poster said) it takes a fuzzy cloth or a wire brush . . . or a sandblaster.