DC my friend,
Your looking at it from a post fulfiment perspective. Not a prefulfilment perspective,
There was a reason peter refused to admit Jesus would die. The reason is NO one could know the suffering servant of Is 53 and the messiah was 1 person. No one could have Know their would be two advents. One the cross, the other yet to come. With a huge gap inbetween. It was part of the mystery of God required to get satan to do what God wanted. Which was to be the one who put things in order to put christ to death, so God to prove once and for all his tru love and Satans hate, essentially putting and end to any possibility there would ever be a rebellion again.
The messiah and suffering servant had different characteristices.
The messiah would never die, his kingdom would never end he would be looked up to,
The suffering servant would have no kingdom, suffer a horrific death, and would be looked down on, not to mention, his name or title was never given,
It was not until after the ressurection, when people looked and saw they are the same they could see what they could not see before.