If you had sought visitation and she was poisoning the children against you, then you would typically have a basis for having her held in contempt of court for that conduct since the parents are obligated to work together toward the best interest of the children and that involves maintain a good relationship for the children.
Since you do not have visitation and you recently attempted to reduce the support order unsuccessfully, there would be no other legal recourse at this time typically I'm afraid.
It does sound unfair to force you to continue selling assets to pay support, but the court used its discretion to impute income to you that you do not actually have it appears.
There is no legal means to undo the adoption either, so that is not an option.
You could wait a couple of years and file another motion to reduce child support and this time retain a reputable family law
attorney to aggressively argue that it must be reduced and appeal the order if the court refuses. That is the only remaining option I'm afraid.
Good luck and take care.
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