The sedes are into conspiracy theories about why and how the Pope Emeritus resigned.
They are claiming that Francis is not a real pope.
They state that the election was invalid.
All these things are errors and may indicate a person has fallen into heresy.
As far as we know from the mouth of Benedict himself, God moved him to resigned. Then, a more liberal pope was elected and a Jesuit to boot.
Here is my take on Francis and what is happening.
Since the early 19th Century, Modernism has plagued the Church.
Modernism is now seen clearly, perhaps for the first time, by some who were not paying attention to the heretics in the Church. There are many heretics wearing red robes.
I believe that this putrid sore of Modernism was lanced by the Pope Emeritus. In other words, the purification and renewal of the Church can only come when the poison of heresies is revealed.
If, indeed God told Benedict to step down it was in order to cleanse the Church openly, in public, and to strengthen the holy remnant.
The Church will prevail.