What is the ruling on a husband not visiting his mother in Ramadan, after her stance in supporting his siblings against him, and the resulting deep psychological crisis for the husband, and does this affect his righteous deeds in Ramadan?

The kindness of a husband and his devotion to his mother are a religious duty. It is not the mother's right to compel him to sell his land for less than its value. The mother must deal with her son kindly and refrain from abuse, and the maternal uncles must cease their mistreatment. The son must be dutiful to his mother and his maternal uncles and not abandon them, no matter what they do. He must repent to Allah for his severance of ties with his mother and his abandonment of his maternal uncles.