The tricky thing about Jewish marriage in galus is that we get married under two completely separate systems of law. When you get divorced, you need to choose one of those systems to follow to dictate the divorce process. You can't pick and choose the parts that work better for you; that's a disaster for everyone.
If you choose the secular law in your jurisdiction, you'll get a secular divorce from that jurisdiction and you'll be able to marry anyone else where that jurisdiciton's divorces are recognized. But you may not be able to marry other adherents to the religion in which you married
There is no guarantee that the other system of law will recognize your divorce. So for example, if a Jewish couple converted to Hinduism and then got divorced, they would now have 3 marriages to dissolve. Let's say the marriage broke up over the wife's desire to unconvert Hinduism and go back to Judaism. So she doesn't really care about the Hindu divorce, she only cares about the Jewish and secular. He doesn't care about the Jewish or secular, only the Hindu. If she takes him to Hindu court, she can't later demand the Hindu court force him to participate in a Jewish divorce. That would need to happen in front of a Jewish court as it's a different body of law.
Nearly all Agunahs today are simply women who took their divorces to secular court and had all the matters ruled on according to that body of law. The husband's simply want a halachic divorce because they still want to be fathers and they don't want to be chained to their ex-spouses through devastating monthly payments to her.