Repeating yourself isn't going to make your position more logical. G-d cannot be both Himself and His messenger. A messenger by definition is not the originator of a message.
Isaiah 55:11 doesn't show us that the Word of G-d acts like a person. In fact, it compares G-d's Word to rain, not a person. But even if that weren't true, there's still no comparison in 55:11 to a person.
A prophet begins his words with "So says G-d" in order to express that he's about to speak a prophecy and not his own words (since after all, he'll be speaking in first person). An angel doesn't need to do this, because it's understood that that's the reason why the angel is there - it's a messenger after all.
Moses hid his face from looking at the angel just as Manoah feared that he would die from having seen an angel.
In the Old Testament, God created the heavens and earth is six days and he rested on the seventh day; Sabbath day. If you look closely, there is no mention of the eighth day of Creation, in the Old Testament. This suggests means God was still on his Sabbath rest during most of the Old Testament, and had not yet started to work a new work week.
During the Sabbath, one is not supposed to do work. One is to prepare all that is needed so they can coast on the Sabbath. God created animal and humans on the sixth day. However, work may still be done on this Sabbath, but his needs to be done by those who do not observe the Sabbath and who are not under its regulations; slaves and servants.
In the case of the Old Testament, the work of the Lord of the Earth, in charge of the humans after their creation and fall, was being done by Satan. Satan was in charge, as God rested on the seven day or Sabbath. God was like the Chairman of the Board of Directors, who meets with the Board of Directors to discuss things, but he does not engage in any hands on things. This is done by the CEO, which was Satan. The Book of Job has God on a plant tour, with Satan. Satan needs Gods approval to put Job through the ringer to prove a point. Satan is leading the tour.
Satan is not thrown from heaven until Revelations, which means Satan was condoned in heaven during Old Testament and even during the Sabbath rest. Satan had previously been Lucifer during the initial creation, while God worked, but evolved into Satan during the Sabbath rest.
Adam and Eve ate of the tree of Knowledge of Good and Evil, which was connected to Satan, by means of the symbolism of the snake in the tree. A snake symbolizes instinct; 1-D impulses. God, via his omniscience, knew what would happen, but he let it happen, since he was resting. Satan had CEO control at that point in time, to do the work for God, as God rested. Satan, like the tree of knowledge of good and evil was also good and evil. God is morally neutral like the tree of Life. Satan was polarized and his favorite tree was also polarized as knowledge of Good and Evil; law. Law came from Satan Lord of the Earth, while God rested.
In the New Testament, especially at the end of Revelations, the old heavens and earth disappear and there is a new Heavens and Earth created. This extreme act of creation would require God to begin the new work week, after his Sabbath ended.
The best place in the New Testament that shows that Satan was the Lord of the Earth, in the Old Testament, was connected to the temptation of Jesus in the wilderness. Among others things, Satan promised Jesus all the wealth and kingdoms of the world if Jesus would bow down and serve Satan.
Jesus never says Satan was lying or that he did not have the authority on earth to give all this. Rather Jesus respectfully declined the offer. Had Jesus accepted this, he would have become the Messiah anticipated by the Old Testament; rich, powerful and able to subdue and control all the enemies of Israel. However, by refusing the offer, Jesus would become something better. Satan would be thrown from heaven and then Jesus would replace Satan, at the right hand of power. The new work week then begins. The first day of the new work week begins when the Heavenly Jerusalem is built and descends from heaven to earth.