What should I do concerning my two children who live with my two ex-wives, who are raising them improperly, taking into consideration the difficulties I might face if I wanted to reclaim the two children?

The default rule is that the custody of children under seven years of age belongs to the mother, unless she remarries or has an impediment such as immorality (fisq). The mother's immorality abrogates her right to custody, whether her immorality is doctrinal or practical. However, if the child is young and there is no fear of him being influenced by the mother's innovation (bid'ah), it appears that her right to custody is not abrogated. If the child reaches seven years of age, he is given the choice between his parents. If he chooses his mother and her immorality is established, her eligibility for custody can be challenged, so that custody transfers to the next female in line, such as the maternal grandmother. Otherwise, it transfers to you.