Christianity was predestined, not individual Christians.
God wants everyone to be saved (1 Tim 2:4; 2 Pet 3:9).
Nope. Regarding 1 Tim 2:4, to understand the "all" we need to look further. The "all" are all the Father gave to Christ which cannot be more than those the Father gave to Christ, of whom must become saved.
[Jhn 6:39 KJV] 39 And this is the Father's will which hath sent me, that of all which he hath given me I should lose nothing, but should raise it up again at the last day.
[Jhn 6:65-66 KJV] 65 And he said, Therefore said I unto you,
that no man can come unto me, except it were given unto him of my Father. 66
From that [time] many of his disciples went back, and walked no more with him.
Regarding Pet 3:9, you need to determine who the "us-ward" are. To do that look at 2 Pet 1:1. Peter is speaking to, and has in
mind, only the elect as being the "us-ward".
[2Pe 1:1 KJV] 1 Simon Peter, a servant and an apostle of Jesus Christ, to them that have
obtained like precious faith with us through the righteousness of God and our Saviour Jesus Christ: