John 15:16 (Quote from Jesus)
I don't want to be the guy that says this, but he's God, we don't understand him, if you try and say what you think God should do, you're not letting the Bible tell you what God does. You're saying what you would do, if you were God. In a way, what you're doing is idolatry. This is not unique to you, I have made the same argument many times.
And I agree with you to an extent, if we have no value above other people, excluding the value God has given us upon salvation, how can you justify Election?
However, this doesn't disprove predestination. I've heard it say, that God can't make us do something we don't want to, because that's a sin. If free will doesn't exist, God isn't making us do something against our will, because our will is what God wills it to be.
In short, I have no answer, other than to say, your argument is similar to people saying "I'm suffering, God wouldn't let this happen. This means there's no God."