If that's true, then that makes even less sense, and I have no idea how it could possibly work in a coherent way. If the essence is not one, then do you believe it is many? I know the essence is beyond all things, so you could say it is beyond even numbers, but then wouldn't it still be one in the sense of a singular concrete identity, since the Essence of God isn't also the Not-Essence of God? That would be a contradiction and/or monism. In looking up quotes of Saints on this topic, I found that St Basil of Caesarea says "The distinction between ousia and hypostases is the same as that between the general and the particular; as, for instance, between the animal and the particular man. Wherefore, in the case of the Godhead, we confess one essence or substance so as not to give variant definition of existence, but we confess a particular hypostasis, in order that our conception of Father, Son, and Holy Spirit may be without confusion and clear."
How can you say that Gods essence is not one, or that it is not the general way in which God is defined?