She’s Catholic and any Catholic is free to criticize a pope’s false teachings. It’s our duty.
Actually it isn't and you cannot.
btw, ebb....who is the last official pope in your worldview?
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The Catholic Church teaches dogmatically that no one is allowed or able to judge the Pope. The Vatican Council (1869-70) taught dogmatically:
And since the Roman Pontiff is at the head of the universal Church by the divine right of apostolic primacy, We teach and declare also that he is the supreme judge of the faithful, and that in all cases pertaining to ecclesiastical examination recourse can be had to his judgment; moreover, that the judgment of the Apostolic See, whose authority is not surpassed, is to be disclaimed by no one, nor is anyone permitted to pass judgment on its judgment. Therefore, they stray from the straight path of truth who affirm that it is permitted to appeal from the judgments of the Roman Pontiffs to an ecumenical Council, as to an authority higher than the Roman Pontiff.
(First Vatican Council, Dogmatic Constitution Pastor Aeternus, Ch. 3; Denz. 1830; underlining added.)
https://novusordowatch.org/2016/03/impossibility-judging-deposing-true-pope/