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premise 1: God exists outside of time.

premise 2: God can see the beginning and end of time (from premise 1).

premise 3: Therefore, God knows what everyone will do (from premise 2).

conclusion: we have no free will.

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Let me first see if I correctly understand the argument you wish to make by rewording it a bit. Then I can render my agreement/disagreement along with my supporting evidence.

premise 1: God exists outside of time.
premise 2: Because God exists outside of time, God can see the beginning and end of time.

minor conclusion 1: Therefore, God knows what we ("everyone") will do.

major conclusion: 2: Since God knows what we will do, we have no free will.