This article may be of help:

"The Eastern Orthodox Church Accepted the Council of Florence"

Of the quotes within this article, this one from the Emperor John VIII on the nature of Ecuмenical Councils is my favorite:

I consider that holy Church cannot err in any way in [defining] sacred teachings, when she has considered them in a common council. For while it is possible for one man or two or three or even more of those who are now living to be deceived when they consider among themselves, it is entirely impossible for the whole Church to be deceived, concerning which our Lord said to Peter: “Thou art Peter, and upon this rock I shall build my Church, and the gates of Hell will not prevail against it.” If it were otherwise, the saving word would have failed, and our faith would have no firm support. But since both these ideas are absurd, the Church of God must needs be infallible, and we must follow her judgment, myself in the first place, who by the grace of God wear the imperial garb.



-AG, 432, qtd. in Crean, p. 380.

As other posters have indicated, Eastern "Orthodoxy" has plenty of internal issues. Where to start? Even within the Greek Church alone, an honest investigation shows that they have a lot of the same problems as the Novus Ordo Church, only with (to their credit) a beautiful liturgy. The Patriarchate of Constantinople is liberal; the Greek Orthodox Church in America, even more liberal; and the Church of Greece (which is autocephalous) is conservative, and constantly fights with both. Here's a YT video produced by an Eastern schismatic on Abp. Elpidophoros, the highest ranking prelate in the Greek Orthodox Church of America:



This isn't even factoring in how the Greek Old Calendarist groups relate to this dynamic, which may have a superficial resemblance to Traditional Catholic groups to the uneducated. An article on that subject from an "Orthodox" perspective:

"How the Greek Old Calendarists Became Radicalized and What the Result Has Been"