How can one deal with a father who exaggerates in his care for his parents at the expense of his wife and children, taking into account that he is a retired professor of Islamic studies, and what is the position of Sharia and Sunnah on this behavior?

Parents must be cared for and honored without neglecting the rights of the wife and children, and children should remind their father of this. Children can help their father care for their grandparents to lighten his burden. Children are advised to honor their parents and to emulate them in honoring parents, and they are warned against disobedience, which is considered a major sin.