The reason why the name of angels ends in "EL" meaning God is mainly because they are original Sons of God. But Christ who is God need not to be called Michael or any other angelic name for that matter.
It is written:Jesus said unto them, Verily, verily, I say unto you, Before Abraham was, I am. John 8:58
It is also written:Exodus 34:14 For thou shalt worship no other god: for the LORD, whose name is Jealous, is a jealous God.
And God said unto Moses, I AM THAT I AM: and he said, Thus shalt thou say unto the children of Israel, I AM hath sent me unto you.
Jude 1:9 states:Yet Michael the archangel, when contending with the devil he disputed about the body of Moses, durst not bring against him a railing accusation, but said, The Lord rebuke thee.
Angels are created beings and God is not therefore such a name would lower His,"I AM" NAME.
And last but not least Christ as God became man through a virgin birth, and those guys, they don't stay around too long and are not men or women{If looked at their humanistic names do not state their sex}. Humanistic so humans can understand, in Heaven names are unknown to humans.
God Bless!