You should read the bull much more carefully.
Humbert, cardinal bishop of the holy Roman Church by the grace of God; Peter, archbishop of Amalfi; and Frederick, deacon and chancellor, to all the children of the catholic Church.
The holy, primary, and apostolic see of Rome, to which the care of all the churches most especially pertains as if to a head, deigned to make us its ambassadors to this royal city for the sake of the peace and utility of the Church so that, in accordance with what has been written, we might descend and see whether the complaint which rises to its ears without ceasing from this great city, is realized in fact or to know if it is not like this.
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But as far as Michael, who is called patriarch through an abuse of the term, and the backers of his foolishness are concerned, innumerable tares of heresies are daily sown in its midst.
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Like Pneumatomachoi or Theomachoi, they cut off the procession of the Holy Spirit from the Son;
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For these errors and many others committed by them, Michael himself, although admonished by the letters of our lord Pope Leo, contemptuously refused to repent. ….
Michael, neophyte patriarch through abuse of office, who took on the monastic habit out of fear of men alone and is now accused by many of the worst of crimes; and with him Leo called bishop of Achrida; Constantine, chaplain of this Michael, who trampled the sacrifice of the Latins with profane feet; and all their followers in the aforementioned errors and acts of presumption: Let them be anathema Maranatha with the Simoniacs, Valesians, Arians, Donatists, Nicolaitists, Severians, Pneumatomachoi, Manichaeans, Nazarenes, and all the heretics — nay, with the devil himself and his angels, unless they should repent. AMEN, AMEN, AMEN.