What are the religious duties towards a mother who is demanding and refuses to change her lifestyle, given the heavy debts and approaching bankruptcy, and is it possible to change the family's living situation despite the mother's refusal and supplication (dua), and does Allah's pleasure lie in self-destruction and approaching bankruptcy?

The fundamental principle is that Allah has removed hardship from people, and His pleasure lies in adhering to the Shari'ah and avoiding extravagance, and in following a moderate path in spending. Therefore, you must balance your dutifulness towards your mother with not overburdening yourself. If you can manage that, then praise be to Allah. Otherwise, you are only obligated to spend on essential necessities such as food, drink, clothing, and shelter, to the extent of your capacity. It is unanimously agreed that the maintenance of poor parents is obligatory upon the child's wealth. Maintenance is only obligatory for the essential necessities indispensable for sustaining life.