What is the ruling of the Sharia regarding the spouses remaining in the family home despite the harm, cramped space, and violation of Sharia, and the mother's refusal for her married son to leave?

The wife has the right to an independent dwelling, and she is not obliged to live with the husband's relatives. The husband is not permitted to violate the wife's right or interfere in her private life. The wife is not obligated to serve her husband's mother except with her consent. The solution lies in the husband providing an independent dwelling, and he must convince his mother of this. If she does not agree, then he should live independently even if she is displeased. If an independent dwelling is not feasible, then she must be patient and exert effort so that the husband's brothers do not see what they are not permitted to see of the wife's body.