Do you, as some Roman Catholics, reject any pope elected after Pope Pius XII?
If so...how do you square that away with Unam Sanctam?
"Furthermore, we declare, we proclaim, we define that it is absolutely necessary for salvation that every human creature be subject to the Roman Pontiff."
The only Sovreign Pontiff is Jesus Christ the only mediator between man and God, the author and perfector of our faith. To call anyone else by the Popes various titles is blasphemy
If you would like some idea why Bergoglio was not canonically elected, visit:
Pope Benedict XVI Forced To Resign
http://spir-food.blogspot.it/2017/01/pope-benedict-xvi-force-to-resign.html
https://josephdwight.wordpress.com/2017/01/27/pope-benedict-xvi-force-to-resign/
https://www.scribd.com/document/337710136/Pope-Benedict-XVI-Force-To-Resign
Also Antonio Socci explains several other reasons why Bergoglio was not elected but he writes in Italian.