If the universe is deterministic than you can change the future obviously, since the future state of the universe depends on the actions you take in the present

If the universe is deterministic than you can change the future obviously, since the future state of the universe depends on the actions you take in the present. If the universe is random then the future state doesn't depend on the current state. Existence is meaningless chaos and you have no control over anything, even your own actions. Your thoughts would be nothing more than meaningless dice rolls that have no correlation with reality, or anything.