You’re avoiding the real question here though, which answers some of the ones you posed:
Jesus was the one who said His blood would be poured out for many. He could have said all, but didn’t. If all are saved by Him no matter what, then why was Christ’s blood poured out for many, not all ?
This is not the real question. For every example you might offer of some language of the limitation of Christ’s sacrifice, the New Testament probably offers ten counter-examples. Here are a few from the NABRE. I emphasize the universal aspect of the text below in bold.
“First of all, then, I ask that supplications, prayers, petitions, and thanksgivings be offered for
everyone… This is good and pleasing to God our savior, who wills
everyone to be saved and to come to knowledge of the truth. For there is one God. There is also one mediator between God and the human race, Christ Jesus, himself human, who gave himself as ransom for
all.” - 1 Tim 2:1, 3-6.
“For this we toil and struggle, because we have set our hope on the living God, who is the savior of
all, especially of those who believe.” 1 Tim 4:10.
“For the grace of God has appeared, saving
all…” Titus 2:11.
“For in him all the fullness was pleased to dwell, and through him to reconcile
all things for him,
making peace by the blood of his cross, whether those on earth or those in heaven.” Colossians 1:19-20.
“In him we have redemption by his blood, the forgiveness of transgressions, in accord with the riches of his grace that he lavished upon us. In all wisdom and insight, he has made known to us the mystery of his will in accord with his favor that he set forth in him as a plan for the fullness of times, to sum up
all things in Christ,
in heaven and on earth.” Ephesians 1:7-10
“For the love of Christ impels us, once we have come to the conviction that one died for
all; therefore, all have died.
He indeed died for all, so that those who live might no longer live for themselves but for him who for their sake died and was raised.” 2 Corinthians 5: 14-15
“The Lord does not delay his promise, as some regard “delay,” but he is patient with you, not wishing that
any should perish but that
all should come to repentance.” 2 Peter 3:9
“In conclusion, just as through one transgression condemnation came upon
all, so through one righteous act acquittal and life came to
all.” Romans 5:15
“And when I am lifted up from the earth, I will draw
everyone to myself.” John 12:32
And on and on the witness of the NT goes…