People REALLY need to stop calling this tool of satan “Pope”. It should be clear by now that he is squatting in the seat. Has never been the Pope, the entire thing is about as valid as the 2020 election and the guy currently squatting in the White House.
However, I think there are legitimate questions that can be asked about whether Benedict XVI's resignation was made freely, and about various irregularities in the 2013 papal election.
Some also claim that +Francis was a valid Pope, but is a contumacious public heretic, meaning that he's effectively abandoned his office.