Argument is stupid, since we have no idea who these men would be, nor any definition of what "worm-ridden" means ... literal? metaphorical? heresy? moral depravity?
Could be that the two worm-ridden "popes" if indeed the word pope is to be taken as meaning "legitimate popes" vs. "putative popes" (recall the joke by +Lefebvre where he said that he does not say that the pope is not the pope nor that one cannot say that the pope is not the pope) ... but even if Our Lady had used the term in the strict sense of a legitimate (vs. putative) pope, perhaps it's a reference to, oh, Pius XI and Pius XII ... who led up to Vatican II. We simply don't know.
And the idioctic Bennyvacantist position are pretending that Bergoglio and Prevost are the two worm-ridden ones ... as if there was nothing wrong with Montini and Wojtyla, even though those two were in fact horrific. So Our Lady's message means that Montini and Wojtyla were just fine compared to Bergs and Prevost, just like the Bennyvacantists? Ridiculous.
And, the term worm-ridden might also mean something other than a metaphor for heresy. I mean ... Montini was widely reputated to have been a practicing sodomite, so maybe she literally refers to parasites.