Isaiah 53, 700 B.C: Historical Evidence of the Divine Omniscience.

[GrandizerII]

"3 He was despised and rejected by others; a man of suffering and acquainted with infirmity, and as one from whom others hide their faces; he was despised, and we held him of no account. 4 Surely he has borne our infirmities and carried our diseases, yet we accounted him stricken, struck down by God, and afflicted. 5 But he was wounded for our transgressions, crushed for our iniquities; upon him was the punishment that made us whole, and by his bruises we are healed.
6 All we like sheep have gone astray; we have all turned to our own way, and the Lord has laid on him the iniquity of us all. 
7 He was oppressed, and he was afflicted, yet he did not open his mouth; like a lamb that is led to the slaughter; and like a sheep that before its shearers is silent, so he did not open his mouth. 8 By a perversion of justice he was taken away. Who could have imagined his future? For he was cut off from the land of the living, stricken for the transgression of my people."

In Isaiah 53, the first person plural is referring to the nations, and the man suffering because of their transgressions represents Israel. The passage is a poetic expression of hope for Israel, not a prediction about a particular individual.

Bucky is already addressing your points anyway, so looks like this was an unnecessary post.

Still, maybe another link might help you here:
https://aish.com/isaiah_53_the_suffering_servant/

Notice, btw, how easy it is to be misled by subtly inaccurate English translations (written by people who are primed to read Jesus into these passages).