You say you don’t know if God knows the manner and time of our deaths, yet you do know that suicide ticks God off?
Why would suicide place a complication in God’s work, if He doesn’t know specifics?
The Bible forbids Murder; suicide is self-murder. The bible does mention seveal instances of suicide - and in each of these it is considered a sinful act.
If God is fully Deterministic - then the suicide was planned and it was simply a ‘tick in the box’ act. The person was slated to die by his own hand - and it just happened as planned. If a person is ‘planned’ to suicide - and his action is fore-ordained; how can this be a sin? He is simply following a course of action that he has no choice in.
If God follows ‘Free Agency’ (for which the war of Heaven was fought - and He sacrificed 1/3 of the Heavenly Host) then Determinism does not apply. Free Will is a key component in God’s plan. Jesus COULD HAVE broken free from the cross, yet that was not his mission. Jesus, by an act of will ALLOWED himself to be murdered so he could save us all. If he was forced - then his death would simply be a normal death.
So, given Free Agency, and you decide to commit suicide; you have taken a sacred gift and thrown it back into the face of God.