He was a negative person in Byzantine history, he pulled empire into civil war in the worst possible moment and pretty much opened way for Serbian and Ottoman expansion. He was a grave-digger of Byzantine empire.So do you think of him as a successfull personality ??
That was a fashion of the time, however a more negative aspect of his work is its apologetic and self-centered tone.He used as many of his copies of part of ancient history in order to describe simila events