If He knows beforehand - then our lives truly are pointless. We have Free Agency, and are put on earth to choose whether we will follow the Divine plan, or will we suscumb to our baser nature. Some of us are inherently 'good' and seek after goodness; others are evil and prey upon the weak for their own benefit. Our rewards in the hereafter will reflect the decisions we have made.
If we are fore-ordained to succeed or fail; then the entire exercise is utterly pointless, it is suffering for the sheer entertainment of a deity - as our suffering on earth would serve no other purpose.
You don’t believe that God knows our futures?
Why would that make our lives pointless? Succeed or fail at what?