I'm not exactly an atheist, not exactly religious either, but Calvinists are the funniest of the funny, let me tell you.
So no man seeks God on his own, but God has already chosen those who will eventually seek God to be saved. Therefore, the whole process of proselytizing for the sake of another's soul is a moot point, since it's already determined beforehand who will do what. Predestination contradicts the concept of free will, throws into question the idea of a loving God, and negates Christ dying on the cross to forgive the sins of mankind. It makes existence nothing more than an elaborate play put on for the sake of one entity.
What's the point of anything if we're just automatons running through a preset program. Why would a loving God create billions upon billions of creatures solely for the purpose of doubting His plan, destined to suffer in eternal damnation? If there's no choice, then there's no reason for any of it.