What is the status of someone who believes that the Church erred in occasional matters of faith and morals before Vatican 2?
Such as the acceptance of certain forms of usury.
The condemnation of Action Française.
The condemnation of the armed struggle by the Cristeros against the mexican government.
The 1892 ralliement of the Church to the French Republic
The homo erotic paintings in the sistine chapel.
The cabalist infiltration in the rennaissance church that resulted in the papal apartments decorated with a painting, still present, of Hermes Trismegistus
The non naming of the traditional enemies of the church in any papal bull, letter or encyclical for over 400 years.
Godefroy, what do you mean by "what is the status"?
I don't know several of the events you mentioned, but some of the others (like Pope Pius XI condemning the Cristeros in Mexico) seem to be personal decisions made by the Pope. Since they're not dogmatic statements about Faith and Morals, they're not infallible and could be the wrong decision, but I don't think they would say anything about the Catholicity of the Pope.