From your link above:
Eastern Orthodoxy believes:
1. That there are three Divine Persons in God, distinct, yet equal. Agreed.
2. That the Father is the head of the Trinity, neither begotten, nor proceeds from anyone.
Contradicts #1 above. How can the Father be the head and yet also equal? Do you mean equal ontologically, or that the Son and Holy Spirit are less equal or subservient when performing redemptive work?
3. That the Son is begotten from the Father, of the very same essence (omo'ousios) of the Father. He is God and also truly Man like us, because He assumed human nature from the Blessed Virgin Mary, except for sin. He died on the Cross to save mankind, and He ascended into Heaven. He will come again to "judge the living and the dead". Agreed.
4. That the Holy Spirit proceeds from the Father. Not sure.
5. That the world is not self-created but is the work of one God. Agreed.
6. That there are Seven Sacraments: Baptism, Holy Chrismation, Holy Eucharist, Holy Confession, Ordination, Marriage, and Holy Unction. Those not highlighted in orange are manmade additions.
Also, baptism need not be performed by ordained priests as it is done "in the name of the Father, Son, Holy Spirit", by anyone who is in a saved relationship with Christ and is therefore a saint in His Church. The power thus comes from the Trinity, and not from the person performing the rite, just as the apostles who were sent out to heal in Jesus' name did it by Jesus' power, and not their own. The same is true for Communion. Marriage is not a sacrament.
The other sacraments were not authorized by Christ, and were added to increase the power and prestige of the priesthood. These other sacrament did not come to be clearly established until Gregory I (590-604) (beginning with penance) and is nowhere found in the early church.
7. That no one can be saved unless he is baptized. Agreed.
8. That the Holy Scriptures and Holy Tradition are of equal value, and that they complete each other. Disagree. Holy Scriptures superior to tradition in determining Truth.
9. That God assigned to every man an Angel to guide and help him. Not biblical. Why would this angel allow someone to die in a car accident? Why does this angel not instruct everyone in the Gospel, including atheists? I guess we don't need your church after all! Angels are messengers, not guides.
10. That after death, man's body goes to earth, and the soul, which is immortal, is presented before God and, according to its actions, pre-enjoys happiness or pre-suffers punishment until the General Judgement. Agreed. The term immortal above is correct. Eternal is an incorrect term for the soul's existence, as many people use it. Only God is eternal.
11. That of all saints, the Mother of God has a supreme grace, and that the veneration given to icons and relics relates not to the sacred images as such, but to the person whom they represent. Veneration is OK. But to pray to, or in the name of, is idolatry.
12. That God knows which road man will take, but He does not predestine him. Not sure. I believe in free will, with limitations, but my belief is not strong here.
As you can see, I accept only the authority of Jesus Christ, as head of His Church, and as revealed in Holy Scriptures, in determining doctrine, and do not recognize manmade doctrine.