To begin with, Mikasa is not at all an ideal woman, she is very toxic. Only a desperate man who makes having a woman his only goal would want a woman like her. Any sane and self-respecting person would not want that, better to be alone than in bad company.

It's sad the experiences you've been able to hear around you and even see it generalized on TV, it's crazy, but that doesn't mean it's the case for all polygamists. After all, it's not because you can marry multiple women that you have to do it. In Islam the rules are clear, to marry more than one you need conditions, you have to be just, fair between them, the one who can't, stay with one woman. If the man does not already fulfill his duties towards a woman, what will happen if he going to get a second or third ? If their intention in the first place is just to satisfy their desire, no wonder it ends badly.