Considering Isaiah 41:8 already explicitly states that the reference "My servant" refers to Israel, we can safely conclude that this passage isn't about the Messiah, but about Israel.
This passage
proves nothing about the Messiah.
I'm not sure if you realized it or not, but the prophecies in Isaiah are spoken by... Isaiah. You see, when someone is speaking and he says, "me" he is referring to himself. The "me" here is Isaiah.
This passage
proves nothing about the Messiah.
As before, the phrase "My servant" has already been explained as referring to Israel.
This verse
proves nothing about the Messiah.
Its important when reading a book, any book, that we attribute to the speaker, the things the speaker says about himself. We don't have to believe what he says about himself. But we need to be aware when he is speaking about himself. In English we have two words for whom this is their function, they are "I and me"".
"I did that."
"He said to me."
In this case, since Isaiah is the prophet speaking these prophecies, and he says, "The Spirit of Jehovah is upon
me", we can conclusively say that Isaiah is saying that the Spirit of Jehovah was upon him. Try this practice and see how it works for you:
1. Find another person
2. Say to him/her "The Spirit of Jehovah is upon me."
3. Ask him/her the following question "who was it I just said the Spirit of Jehovah is on?"
4 Ignore
and repeat question. Include the words "No really," at the beginning of the question.
So you see, this passage
proves nothing about the Messiah.