Seems still to me to be referring to the singular Son of man, Lord Jesus!The book of Psalms has 150 chapters. I am speaking of Psalm 8:6-8. Deal with the text.
I'd like to get to Hebrews 2:6 to 8 later. But since you have not been able to explain Ps. 8:6-8, the Hebrews passage will have to wait.